1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 bool need_baud_change = false; 1438 1439 #ifndef HAVE_HOST_CONTROLLER_API 1440 need_baud_change = hci_stack->config 1441 && hci_stack->chipset 1442 && hci_stack->chipset->set_baudrate_command 1443 && hci_stack->hci_transport->set_baudrate 1444 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1445 #endif 1446 1447 switch (hci_stack->substate){ 1448 case HCI_INIT_SEND_RESET: 1449 hci_state_reset(); 1450 1451 #ifndef HAVE_HOST_CONTROLLER_API 1452 // prepare reset if command complete not received in 100ms 1453 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1454 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1455 btstack_run_loop_add_timer(&hci_stack->timeout); 1456 #endif 1457 // send command 1458 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1459 hci_send_cmd(&hci_reset); 1460 break; 1461 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1462 hci_send_cmd(&hci_read_local_version_information); 1463 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1464 break; 1465 case HCI_INIT_SEND_READ_LOCAL_NAME: 1466 hci_send_cmd(&hci_read_local_name); 1467 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1468 break; 1469 1470 #ifndef HAVE_HOST_CONTROLLER_API 1471 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1472 hci_state_reset(); 1473 // prepare reset if command complete not received in 100ms 1474 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1475 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1476 btstack_run_loop_add_timer(&hci_stack->timeout); 1477 // send command 1478 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1479 hci_send_cmd(&hci_reset); 1480 break; 1481 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1482 hci_state_reset(); 1483 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1484 hci_send_cmd(&hci_reset); 1485 break; 1486 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1487 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1488 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1489 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1490 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1491 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1492 break; 1493 } 1494 case HCI_INIT_SET_BD_ADDR: 1495 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1496 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1497 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1498 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1499 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1500 break; 1501 case HCI_INIT_SEND_BAUD_CHANGE: 1502 if (need_baud_change) { 1503 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1504 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1505 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1506 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1507 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1508 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1509 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1511 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1512 btstack_run_loop_add_timer(&hci_stack->timeout); 1513 } 1514 break; 1515 } 1516 1517 /* fall through */ 1518 1519 case HCI_INIT_CUSTOM_INIT: 1520 // Custom initialization 1521 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1522 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1523 bool send_cmd = false; 1524 switch (hci_stack->chipset_result){ 1525 case BTSTACK_CHIPSET_VALID_COMMAND: 1526 send_cmd = true; 1527 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1528 break; 1529 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1530 send_cmd = true; 1531 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1532 log_info("CSR Warm Boot"); 1533 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1534 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1535 btstack_run_loop_add_timer(&hci_stack->timeout); 1536 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1537 && hci_stack->config 1538 && hci_stack->chipset 1539 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1540 && hci_stack->hci_transport->set_baudrate 1541 && hci_transport_uart_get_main_baud_rate()){ 1542 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1543 } else { 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1545 } 1546 break; 1547 default: 1548 break; 1549 } 1550 1551 if (send_cmd){ 1552 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1553 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1554 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1555 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1556 break; 1557 } 1558 log_info("Init script done"); 1559 1560 // Init script download on Broadcom chipsets causes: 1561 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1562 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1563 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1564 1565 // - baud rate to reset, restore UART baud rate if needed 1566 if (need_baud_change) { 1567 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1568 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1569 hci_stack->hci_transport->set_baudrate(baud_rate); 1570 } 1571 1572 uint16_t bcm_delay_ms = 300; 1573 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1574 // -> Work around: wait here. 1575 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1576 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1577 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1578 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1579 btstack_run_loop_add_timer(&hci_stack->timeout); 1580 break; 1581 } 1582 } 1583 /* fall through */ 1584 #endif 1585 1586 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1587 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1588 hci_send_cmd(&hci_read_local_supported_commands); 1589 break; 1590 case HCI_INIT_READ_BD_ADDR: 1591 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1592 hci_send_cmd(&hci_read_bd_addr); 1593 break; 1594 case HCI_INIT_READ_BUFFER_SIZE: 1595 // only read buffer size if supported 1596 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1597 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1598 hci_send_cmd(&hci_read_buffer_size); 1599 break; 1600 } 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1605 hci_send_cmd(&hci_read_local_supported_features); 1606 break; 1607 1608 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1609 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1610 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1611 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1612 break; 1613 case HCI_INIT_HOST_BUFFER_SIZE: 1614 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1615 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1616 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1617 break; 1618 #endif 1619 1620 case HCI_INIT_SET_EVENT_MASK: 1621 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1622 if (hci_le_supported()){ 1623 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1624 } else { 1625 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1626 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1627 } 1628 break; 1629 1630 #ifdef ENABLE_CLASSIC 1631 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1632 if (hci_classic_supported() && gap_ssp_supported()){ 1633 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1634 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1635 break; 1636 } 1637 /* fall through */ 1638 1639 case HCI_INIT_WRITE_INQUIRY_MODE: 1640 if (hci_classic_supported()){ 1641 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1642 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1643 break; 1644 } 1645 /* fall through */ 1646 1647 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1648 // skip write secure connections host support if not supported or disabled 1649 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1650 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1651 hci_stack->secure_connections_active = true; 1652 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1653 break; 1654 } 1655 /* fall through */ 1656 1657 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1658 if (hci_classic_supported()){ 1659 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1660 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1661 break; 1662 } 1663 /* fall through */ 1664 1665 // only sent if ENABLE_SCO_OVER_HCI is defined 1666 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1667 if (hci_classic_supported()){ 1668 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1669 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1670 break; 1671 } 1672 /* fall through */ 1673 1674 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1675 if (hci_classic_supported()){ 1676 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1677 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1678 break; 1679 } 1680 /* fall through */ 1681 1682 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1683 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1684 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1685 if (hci_classic_supported()){ 1686 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1687 #ifdef ENABLE_SCO_OVER_HCI 1688 log_info("BCM: Route SCO data via HCI transport"); 1689 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1690 #endif 1691 #ifdef ENABLE_SCO_OVER_PCM 1692 log_info("BCM: Route SCO data via PCM interface"); 1693 #ifdef ENABLE_BCM_PCM_WBS 1694 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1695 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1696 #else 1697 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1698 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1699 #endif 1700 #endif 1701 break; 1702 } 1703 /* fall through */ 1704 #endif 1705 1706 #ifdef ENABLE_SCO_OVER_PCM 1707 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1708 if (hci_classic_supported()){ 1709 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1710 log_info("BCM: Config PCM interface for I2S"); 1711 #ifdef ENABLE_BCM_PCM_WBS 1712 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1713 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1714 #else 1715 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1716 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1717 #endif 1718 break; 1719 } 1720 /* fall through */ 1721 #endif 1722 #endif 1723 1724 #ifdef ENABLE_BLE 1725 // LE INIT 1726 case HCI_INIT_LE_READ_BUFFER_SIZE: 1727 if (hci_le_supported()){ 1728 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1729 hci_send_cmd(&hci_le_read_buffer_size); 1730 break; 1731 } 1732 /* fall through */ 1733 1734 case HCI_INIT_LE_SET_EVENT_MASK: 1735 if (hci_le_supported()){ 1736 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1737 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1738 break; 1739 } 1740 /* fall through */ 1741 1742 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1743 if (hci_le_supported()){ 1744 // LE Supported Host = 1, Simultaneous Host = 0 1745 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1746 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1747 break; 1748 } 1749 /* fall through */ 1750 1751 #endif 1752 1753 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1754 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1755 if (hci_le_supported()){ 1756 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1757 hci_send_cmd(&hci_le_read_maximum_data_length); 1758 break; 1759 } 1760 /* fall through */ 1761 1762 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1763 if (hci_le_supported()){ 1764 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1765 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1766 break; 1767 } 1768 /* fall through */ 1769 #endif 1770 1771 #ifdef ENABLE_LE_CENTRAL 1772 case HCI_INIT_READ_WHITE_LIST_SIZE: 1773 if (hci_le_supported()){ 1774 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1775 hci_send_cmd(&hci_le_read_white_list_size); 1776 break; 1777 } 1778 /* fall through */ 1779 1780 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1781 if (hci_le_supported()){ 1782 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1783 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1784 break; 1785 } 1786 /* fall through */ 1787 #endif 1788 1789 case HCI_INIT_DONE: 1790 hci_stack->substate = HCI_INIT_DONE; 1791 #ifdef ENABLE_CLASSIC 1792 // init sequence complete, check if GAP Tasks are completed 1793 if (hci_stack->gap_tasks != 0) { 1794 hci_run_gap_tasks_classic(); 1795 break; 1796 } 1797 #endif 1798 hci_init_done(); 1799 break; 1800 1801 default: 1802 return; 1803 } 1804 } 1805 1806 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1807 bool command_completed = false; 1808 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1809 uint16_t opcode = little_endian_read_16(packet,3); 1810 if (opcode == hci_stack->last_cmd_opcode){ 1811 command_completed = true; 1812 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1813 } else { 1814 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1815 } 1816 } 1817 1818 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1819 uint8_t status = packet[2]; 1820 uint16_t opcode = little_endian_read_16(packet,4); 1821 if (opcode == hci_stack->last_cmd_opcode){ 1822 if (status){ 1823 command_completed = true; 1824 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1825 } else { 1826 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1827 } 1828 } else { 1829 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1830 } 1831 } 1832 #ifndef HAVE_HOST_CONTROLLER_API 1833 // Vendor == CSR 1834 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1835 // TODO: track actual command 1836 command_completed = true; 1837 } 1838 1839 // Vendor == Toshiba 1840 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1841 // TODO: track actual command 1842 command_completed = true; 1843 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1844 hci_stack->num_cmd_packets = 1; 1845 } 1846 #endif 1847 1848 return command_completed; 1849 } 1850 1851 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1852 1853 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1854 1855 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1856 1857 #ifndef HAVE_HOST_CONTROLLER_API 1858 1859 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1860 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1861 // 1862 // HCI Reset 1863 // Timeout 100 ms 1864 // HCI Reset 1865 // Command Complete Reset 1866 // HCI Read Local Version Information 1867 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1868 // hang... 1869 // 1870 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1871 if (!command_completed 1872 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1873 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1874 1875 uint16_t opcode = little_endian_read_16(packet,3); 1876 if (opcode == hci_reset.opcode){ 1877 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1878 return; 1879 } 1880 } 1881 1882 // CSR & H5 1883 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1884 if (!command_completed 1885 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1886 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1887 1888 uint16_t opcode = little_endian_read_16(packet,3); 1889 if (opcode == hci_reset.opcode){ 1890 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1891 return; 1892 } 1893 } 1894 1895 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1896 // fix: Correct substate and behave as command below 1897 if (command_completed){ 1898 switch (hci_stack->substate){ 1899 case HCI_INIT_SEND_RESET: 1900 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1901 break; 1902 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1903 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1904 break; 1905 default: 1906 break; 1907 } 1908 } 1909 1910 #endif 1911 1912 if (!command_completed) return; 1913 1914 bool need_baud_change = false; 1915 bool need_addr_change = false; 1916 1917 #ifndef HAVE_HOST_CONTROLLER_API 1918 need_baud_change = hci_stack->config 1919 && hci_stack->chipset 1920 && hci_stack->chipset->set_baudrate_command 1921 && hci_stack->hci_transport->set_baudrate 1922 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1923 1924 need_addr_change = hci_stack->custom_bd_addr_set 1925 && hci_stack->chipset 1926 && hci_stack->chipset->set_bd_addr_command; 1927 #endif 1928 1929 switch(hci_stack->substate){ 1930 1931 #ifndef HAVE_HOST_CONTROLLER_API 1932 case HCI_INIT_SEND_RESET: 1933 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1934 // fix: just correct substate and behave as command below 1935 1936 /* fall through */ 1937 #endif 1938 1939 case HCI_INIT_W4_SEND_RESET: 1940 btstack_run_loop_remove_timer(&hci_stack->timeout); 1941 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1942 return; 1943 1944 #ifndef HAVE_HOST_CONTROLLER_API 1945 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1946 // for STLC2500D, baud rate change already happened. 1947 // for others, baud rate gets changed now 1948 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1949 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1950 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1951 hci_stack->hci_transport->set_baudrate(baud_rate); 1952 } 1953 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1954 return; 1955 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1956 btstack_run_loop_remove_timer(&hci_stack->timeout); 1957 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1958 return; 1959 case HCI_INIT_W4_CUSTOM_INIT: 1960 // repeat custom init 1961 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1962 return; 1963 #endif 1964 1965 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1966 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1967 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1968 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1969 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1970 return; 1971 } 1972 if (need_addr_change){ 1973 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1974 return; 1975 } 1976 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1977 return; 1978 #ifndef HAVE_HOST_CONTROLLER_API 1979 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1980 if (need_baud_change){ 1981 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1982 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1983 hci_stack->hci_transport->set_baudrate(baud_rate); 1984 } 1985 if (need_addr_change){ 1986 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1987 return; 1988 } 1989 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1990 return; 1991 case HCI_INIT_W4_SET_BD_ADDR: 1992 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1993 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1994 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1995 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1996 return; 1997 } 1998 // skipping st warm boot 1999 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2000 return; 2001 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2002 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2003 return; 2004 #endif 2005 2006 #ifdef ENABLE_BLE 2007 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 2008 // skip write le host if not supported (e.g. on LE only EM9301) 2009 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 2010 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2011 return; 2012 2013 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2014 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 2015 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 2016 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 2017 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2018 return; 2019 } 2020 // explicit fall through to reduce repetitions 2021 2022 #ifdef ENABLE_LE_CENTRAL 2023 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 2024 #else 2025 hci_stack->substate = HCI_INIT_DONE; 2026 #endif 2027 return; 2028 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 2029 2030 #endif /* ENABLE_BLE */ 2031 2032 #ifdef ENABLE_SCO_OVER_HCI 2033 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2034 // skip write synchronous flow control if not supported 2035 if (hci_stack->local_supported_commands[0] & 0x04) break; 2036 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2037 2038 /* fall through */ 2039 2040 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2041 // skip write default erroneous data reporting if not supported 2042 if (hci_stack->local_supported_commands[0] & 0x08) break; 2043 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2044 2045 /* fall through */ 2046 2047 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2048 // skip bcm set sco pcm config on non-Broadcom chipsets 2049 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2050 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2051 2052 /* fall through */ 2053 2054 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2055 if (!hci_le_supported()){ 2056 // SKIP LE init for Classic only configuration 2057 hci_stack->substate = HCI_INIT_DONE; 2058 return; 2059 } 2060 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2061 break; 2062 2063 #else /* !ENABLE_SCO_OVER_HCI */ 2064 2065 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2066 #ifdef ENABLE_SCO_OVER_PCM 2067 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2068 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2069 return; 2070 } 2071 #endif 2072 /* fall through */ 2073 2074 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2075 #ifdef ENABLE_BLE 2076 if (hci_le_supported()){ 2077 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2078 return; 2079 } 2080 #endif 2081 // SKIP LE init for Classic only configuration 2082 hci_stack->substate = HCI_INIT_DONE; 2083 return; 2084 #endif /* ENABLE_SCO_OVER_HCI */ 2085 2086 case HCI_INIT_DONE: 2087 // set state if we came here by fall through 2088 hci_stack->substate = HCI_INIT_DONE; 2089 return; 2090 2091 default: 2092 break; 2093 } 2094 hci_initializing_next_state(); 2095 } 2096 2097 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2098 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2099 bd_addr_t bd_address; 2100 (void)memcpy(&bd_address, conn->address, 6); 2101 2102 #ifdef ENABLE_CLASSIC 2103 // cache needed data 2104 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2105 #endif 2106 2107 // connection failed, remove entry 2108 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2109 btstack_memory_hci_connection_free( conn ); 2110 2111 #ifdef ENABLE_CLASSIC 2112 // notify client if dedicated bonding 2113 if (notify_dedicated_bonding_failed){ 2114 log_info("hci notify_dedicated_bonding_failed"); 2115 hci_emit_dedicated_bonding_result(bd_address, status); 2116 } 2117 2118 // if authentication error, also delete link key 2119 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2120 gap_drop_link_key_for_bd_addr(bd_address); 2121 } 2122 #else 2123 UNUSED(status); 2124 #endif 2125 } 2126 2127 #ifdef ENABLE_CLASSIC 2128 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2129 // SSP Controller 2130 if (features[6] & (1 << 3)){ 2131 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2132 } 2133 // eSCO 2134 if (features[3] & (1<<7)){ 2135 conn->remote_supported_features[0] |= 1; 2136 } 2137 // Extended features 2138 if (features[7] & (1<<7)){ 2139 conn->remote_supported_features[0] |= 2; 2140 } 2141 } 2142 2143 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2144 // SSP Host 2145 if (features[0] & (1 << 0)){ 2146 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2147 } 2148 // SC Host 2149 if (features[0] & (1 << 3)){ 2150 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2151 } 2152 } 2153 2154 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2155 // SC Controller 2156 if (features[1] & (1 << 0)){ 2157 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2158 } 2159 } 2160 2161 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2162 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2163 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2164 if (conn->bonding_flags & BONDING_DEDICATED){ 2165 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2166 } 2167 } 2168 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2169 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2170 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2171 } 2172 2173 #endif 2174 2175 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2176 // handle BT initialization 2177 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2178 hci_initializing_event_handler(packet, size); 2179 } 2180 2181 // help with BT sleep 2182 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2183 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2184 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2185 hci_initializing_next_state(); 2186 } 2187 } 2188 2189 #ifdef ENABLE_CLASSIC 2190 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2191 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2192 conn->encryption_key_size = encryption_key_size; 2193 2194 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2195 conn->requested_security_level = LEVEL_0; 2196 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2197 return; 2198 } 2199 2200 // Request Authentication if not already done 2201 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2202 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2203 } 2204 #endif 2205 2206 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2207 UNUSED(size); 2208 2209 uint16_t manufacturer; 2210 #ifdef ENABLE_CLASSIC 2211 hci_con_handle_t handle; 2212 hci_connection_t * conn; 2213 uint8_t status; 2214 #endif 2215 // get num cmd packets - limit to 1 to reduce complexity 2216 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2217 2218 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2219 switch (opcode){ 2220 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2221 if (packet[5]) break; 2222 // terminate, name 248 chars 2223 packet[6+248] = 0; 2224 log_info("local name: %s", &packet[6]); 2225 break; 2226 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2227 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2228 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2229 uint16_t acl_len = little_endian_read_16(packet, 6); 2230 uint16_t sco_len = packet[8]; 2231 2232 // determine usable ACL/SCO payload size 2233 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2234 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2235 2236 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2237 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2238 2239 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2240 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2241 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2242 } 2243 break; 2244 case HCI_OPCODE_HCI_READ_RSSI: 2245 if (packet[5] == ERROR_CODE_SUCCESS){ 2246 uint8_t event[5]; 2247 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2248 event[1] = 3; 2249 (void)memcpy(&event[2], &packet[6], 3); 2250 hci_emit_event(event, sizeof(event), 1); 2251 } 2252 break; 2253 #ifdef ENABLE_BLE 2254 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2255 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2256 hci_stack->le_acl_packets_total_num = packet[8]; 2257 // determine usable ACL payload size 2258 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2259 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2260 } 2261 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2262 break; 2263 #endif 2264 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2265 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2266 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2267 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2268 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2269 break; 2270 #endif 2271 #ifdef ENABLE_LE_CENTRAL 2272 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2273 hci_stack->le_whitelist_capacity = packet[6]; 2274 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2275 break; 2276 #endif 2277 case HCI_OPCODE_HCI_READ_BD_ADDR: 2278 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2279 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2280 #ifdef ENABLE_CLASSIC 2281 if (hci_stack->link_key_db){ 2282 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2283 } 2284 #endif 2285 break; 2286 #ifdef ENABLE_CLASSIC 2287 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2288 hci_emit_discoverable_enabled(hci_stack->discoverable); 2289 break; 2290 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2291 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2292 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2293 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2294 hci_emit_event(event, sizeof(event), 1); 2295 } 2296 break; 2297 #endif 2298 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2299 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2300 2301 #ifdef ENABLE_CLASSIC 2302 // determine usable ACL packet types based on host buffer size and supported features 2303 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2304 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2305 #endif 2306 // Classic/LE 2307 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2308 break; 2309 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2310 manufacturer = little_endian_read_16(packet, 10); 2311 // map Cypress to Broadcom 2312 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2313 log_info("Treat Cypress as Broadcom"); 2314 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2315 little_endian_store_16(packet, 10, manufacturer); 2316 } 2317 hci_stack->manufacturer = manufacturer; 2318 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2319 break; 2320 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2321 hci_stack->local_supported_commands[0] = 2322 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2323 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2324 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2325 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2326 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2327 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2328 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2329 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2330 hci_stack->local_supported_commands[1] = 2331 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2332 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2333 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2334 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2335 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2336 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2337 break; 2338 #ifdef ENABLE_CLASSIC 2339 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2340 if (packet[5]) return; 2341 hci_stack->synchronous_flow_control_enabled = 1; 2342 break; 2343 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2344 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2345 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2346 conn = hci_connection_for_handle(handle); 2347 if (conn != NULL) { 2348 uint8_t key_size = 0; 2349 if (status == 0){ 2350 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2351 log_info("Handle %04x key Size: %u", handle, key_size); 2352 } else { 2353 key_size = 1; 2354 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2355 } 2356 hci_handle_read_encryption_key_size_complete(conn, key_size); 2357 } 2358 break; 2359 // assert pairing complete event is emitted. 2360 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2361 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2362 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2363 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2364 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2365 // lookup connection by gap pairing addr 2366 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2367 if (conn == NULL) break; 2368 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2369 break; 2370 2371 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2372 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2373 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2374 uint8_t event[67]; 2375 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2376 event[1] = 65; 2377 (void)memset(&event[2], 0, 65); 2378 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2379 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2380 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2381 event[2] = 3; 2382 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2383 } else { 2384 event[2] = 1; 2385 } 2386 } 2387 hci_emit_event(event, sizeof(event), 0); 2388 break; 2389 } 2390 2391 // note: only needed if user does not provide OOB data 2392 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2393 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2394 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2395 if (conn == NULL) break; 2396 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2397 break; 2398 #endif 2399 #endif 2400 default: 2401 break; 2402 } 2403 } 2404 2405 #ifdef ENABLE_BLE 2406 static void event_handle_le_connection_complete(const uint8_t * packet){ 2407 bd_addr_t addr; 2408 bd_addr_type_t addr_type; 2409 hci_connection_t * conn; 2410 2411 // Connection management 2412 reverse_bd_addr(&packet[8], addr); 2413 addr_type = (bd_addr_type_t)packet[7]; 2414 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2415 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2416 2417 #ifdef ENABLE_LE_CENTRAL 2418 // handle error: error is reported only to the initiator -> outgoing connection 2419 if (packet[3]){ 2420 2421 // handle cancelled outgoing connection 2422 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2423 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2424 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2425 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2426 // reset state 2427 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2428 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2429 // get outgoing connection conn struct for direct connect 2430 conn = gap_get_outgoing_connection(); 2431 } 2432 2433 // outgoing le connection establishment is done 2434 if (conn){ 2435 // remove entry 2436 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2437 btstack_memory_hci_connection_free( conn ); 2438 } 2439 return; 2440 } 2441 #endif 2442 2443 // on success, both hosts receive connection complete event 2444 if (packet[6] == HCI_ROLE_MASTER){ 2445 #ifdef ENABLE_LE_CENTRAL 2446 // if we're master on an le connection, it was an outgoing connection and we're done with it 2447 // note: no hci_connection_t object exists yet for connect with whitelist 2448 if (hci_is_le_connection_type(addr_type)){ 2449 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2450 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2451 } 2452 #endif 2453 } else { 2454 #ifdef ENABLE_LE_PERIPHERAL 2455 // if we're slave, it was an incoming connection, advertisements have stopped 2456 hci_stack->le_advertisements_active = false; 2457 #endif 2458 } 2459 2460 // LE connections are auto-accepted, so just create a connection if there isn't one already 2461 if (!conn){ 2462 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2463 } 2464 2465 // no memory, sorry. 2466 if (!conn){ 2467 return; 2468 } 2469 2470 conn->state = OPEN; 2471 conn->role = packet[6]; 2472 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2473 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2474 2475 #ifdef ENABLE_LE_PERIPHERAL 2476 if (packet[6] == HCI_ROLE_SLAVE){ 2477 hci_update_advertisements_enabled_for_current_roles(); 2478 } 2479 #endif 2480 2481 // init unenhanced att bearer mtu 2482 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2483 conn->att_connection.mtu_exchanged = false; 2484 2485 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2486 2487 // restart timer 2488 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2489 // btstack_run_loop_add_timer(&conn->timeout); 2490 2491 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2492 2493 hci_emit_nr_connections_changed(); 2494 } 2495 #endif 2496 2497 #ifdef ENABLE_CLASSIC 2498 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 2499 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2500 // LEVEL_4 is tested by l2cap 2501 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2502 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2503 if (level >= LEVEL_3){ 2504 // MITM not possible without keyboard or display 2505 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2506 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2507 2508 // MITM possible if one side has keyboard and the other has keyboard or display 2509 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2510 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2511 2512 // MITM not possible if one side has only display and other side has no keyboard 2513 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2514 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2515 } 2516 // LEVEL 2 requires SSP, which is a given 2517 return true; 2518 } 2519 2520 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2521 uint16_t i; 2522 for (i=0; i < size ; i++){ 2523 if (data[i] != 0) { 2524 return false; 2525 } 2526 } 2527 return true; 2528 } 2529 2530 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2531 // get requested security level 2532 gap_security_level_t requested_security_level = conn->requested_security_level; 2533 if (hci_stack->gap_secure_connections_only_mode){ 2534 requested_security_level = LEVEL_4; 2535 } 2536 2537 // assess security: LEVEL 4 requires SC 2538 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2539 if ((requested_security_level == LEVEL_4) && 2540 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2541 !hci_remote_sc_enabled(conn)){ 2542 log_info("Level 4 required, but SC not supported -> abort"); 2543 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2544 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2545 return; 2546 } 2547 2548 // assess security based on io capabilities 2549 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2550 // responder: fully validate io caps of both sides as well as OOB data 2551 bool security_possible = false; 2552 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2553 2554 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2555 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2556 // so we merge the OOB data availability 2557 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2558 if (conn->classic_oob_c_192 != NULL){ 2559 have_oob_data |= 1; 2560 } 2561 if (conn->classic_oob_c_256 != NULL){ 2562 have_oob_data |= 2; 2563 } 2564 // for up to Level 3, either P-192 as well as P-256 will do 2565 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2566 // if remote does not SC, we should not receive P-256 data either 2567 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2568 security_possible = true; 2569 } 2570 // for Level 4, P-256 is needed 2571 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2572 security_possible = true; 2573 } 2574 #endif 2575 2576 if (security_possible == false){ 2577 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2578 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2579 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2580 return; 2581 } 2582 } else { 2583 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2584 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2585 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2586 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2587 log_info("Level 3+ required, but no input/output -> abort"); 2588 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2589 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2590 return; 2591 } 2592 #endif 2593 #endif 2594 } 2595 2596 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2597 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2598 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2599 } else { 2600 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2601 } 2602 #endif 2603 } 2604 2605 #endif 2606 2607 static void event_handler(uint8_t *packet, uint16_t size){ 2608 2609 uint16_t event_length = packet[1]; 2610 2611 // assert packet is complete 2612 if (size != (event_length + 2u)){ 2613 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2614 return; 2615 } 2616 2617 bd_addr_type_t addr_type; 2618 hci_con_handle_t handle; 2619 hci_connection_t * conn; 2620 int i; 2621 int create_connection_cmd; 2622 2623 #ifdef ENABLE_CLASSIC 2624 hci_link_type_t link_type; 2625 bd_addr_t addr; 2626 #endif 2627 2628 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2629 2630 switch (hci_event_packet_get_type(packet)) { 2631 2632 case HCI_EVENT_COMMAND_COMPLETE: 2633 handle_command_complete_event(packet, size); 2634 break; 2635 2636 case HCI_EVENT_COMMAND_STATUS: 2637 // get num cmd packets - limit to 1 to reduce complexity 2638 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2639 2640 // check command status to detected failed outgoing connections 2641 create_connection_cmd = 0; 2642 #ifdef ENABLE_CLASSIC 2643 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2644 create_connection_cmd = 1; 2645 } 2646 #endif 2647 #ifdef ENABLE_LE_CENTRAL 2648 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2649 create_connection_cmd = 1; 2650 } 2651 #endif 2652 if (create_connection_cmd) { 2653 uint8_t status = hci_event_command_status_get_status(packet); 2654 addr_type = hci_stack->outgoing_addr_type; 2655 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2656 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2657 2658 // reset outgoing address info 2659 memset(hci_stack->outgoing_addr, 0, 6); 2660 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2661 2662 // on error 2663 if (status != ERROR_CODE_SUCCESS){ 2664 #ifdef ENABLE_LE_CENTRAL 2665 if (hci_is_le_connection_type(addr_type)){ 2666 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2667 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2668 } 2669 #endif 2670 // error => outgoing connection failed 2671 if (conn != NULL){ 2672 hci_handle_connection_failed(conn, status); 2673 } 2674 } 2675 } 2676 2677 #ifdef ENABLE_CLASSIC 2678 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2679 uint8_t status = hci_event_command_status_get_status(packet); 2680 log_info("command status (inquiry), status %x", status); 2681 if (status == ERROR_CODE_SUCCESS) { 2682 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2683 } else { 2684 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2685 } 2686 } 2687 #endif 2688 break; 2689 2690 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2691 if (size < 3) return; 2692 uint16_t num_handles = packet[2]; 2693 if (size != (3u + num_handles * 4u)) return; 2694 uint16_t offset = 3; 2695 for (i=0; i<num_handles;i++){ 2696 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2697 offset += 2u; 2698 uint16_t num_packets = little_endian_read_16(packet, offset); 2699 offset += 2u; 2700 2701 conn = hci_connection_for_handle(handle); 2702 if (!conn){ 2703 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2704 continue; 2705 } 2706 2707 if (conn->num_packets_sent >= num_packets){ 2708 conn->num_packets_sent -= num_packets; 2709 } else { 2710 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2711 conn->num_packets_sent = 0; 2712 } 2713 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2714 2715 #ifdef ENABLE_CLASSIC 2716 // For SCO, we do the can_send_now_check here 2717 hci_notify_if_sco_can_send_now(); 2718 #endif 2719 } 2720 break; 2721 } 2722 2723 #ifdef ENABLE_CLASSIC 2724 case HCI_EVENT_INQUIRY_COMPLETE: 2725 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2726 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2727 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2728 hci_emit_event(event, sizeof(event), 1); 2729 } 2730 break; 2731 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2732 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2733 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2734 } 2735 break; 2736 case HCI_EVENT_CONNECTION_REQUEST: 2737 reverse_bd_addr(&packet[2], addr); 2738 link_type = (hci_link_type_t) packet[11]; 2739 2740 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2741 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2742 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2743 bd_addr_copy(hci_stack->decline_addr, addr); 2744 break; 2745 } 2746 2747 if (hci_stack->gap_classic_accept_callback != NULL){ 2748 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2749 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2750 bd_addr_copy(hci_stack->decline_addr, addr); 2751 break; 2752 } 2753 } 2754 2755 // TODO: eval COD 8-10 2756 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2757 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2758 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2759 if (!conn) { 2760 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2761 } 2762 if (!conn) { 2763 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2764 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2765 bd_addr_copy(hci_stack->decline_addr, addr); 2766 break; 2767 } 2768 conn->role = HCI_ROLE_SLAVE; 2769 conn->state = RECEIVED_CONNECTION_REQUEST; 2770 // store info about eSCO 2771 if (link_type == HCI_LINK_TYPE_ESCO){ 2772 conn->remote_supported_features[0] |= 1; 2773 } 2774 hci_run(); 2775 break; 2776 2777 case HCI_EVENT_CONNECTION_COMPLETE: 2778 // Connection management 2779 reverse_bd_addr(&packet[5], addr); 2780 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2781 addr_type = BD_ADDR_TYPE_ACL; 2782 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2783 if (conn) { 2784 if (!packet[2]){ 2785 conn->state = OPEN; 2786 conn->con_handle = little_endian_read_16(packet, 3); 2787 2788 // queue get remote feature 2789 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2790 2791 // queue set supervision timeout if we're master 2792 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2793 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2794 } 2795 2796 // restart timer 2797 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2798 btstack_run_loop_add_timer(&conn->timeout); 2799 2800 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2801 2802 hci_emit_nr_connections_changed(); 2803 } else { 2804 // connection failed 2805 hci_handle_connection_failed(conn, packet[2]); 2806 } 2807 } 2808 break; 2809 2810 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2811 reverse_bd_addr(&packet[5], addr); 2812 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2813 if (packet[2]){ 2814 // connection failed 2815 break; 2816 } 2817 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2818 if (!conn) { 2819 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2820 } 2821 if (!conn) { 2822 break; 2823 } 2824 conn->state = OPEN; 2825 conn->con_handle = little_endian_read_16(packet, 3); 2826 2827 #ifdef ENABLE_SCO_OVER_HCI 2828 // update SCO 2829 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2830 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2831 } 2832 // trigger can send now 2833 if (hci_have_usb_transport()){ 2834 hci_stack->sco_can_send_now = true; 2835 } 2836 #endif 2837 #ifdef HAVE_SCO_TRANSPORT 2838 // configure sco transport 2839 if (hci_stack->sco_transport != NULL){ 2840 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2841 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2842 } 2843 #endif 2844 break; 2845 2846 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2847 handle = little_endian_read_16(packet, 3); 2848 conn = hci_connection_for_handle(handle); 2849 if (!conn) break; 2850 if (!packet[2]){ 2851 const uint8_t * features = &packet[5]; 2852 hci_handle_remote_features_page_0(conn, features); 2853 2854 // read extended features if possible 2855 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2856 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2857 break; 2858 } 2859 } 2860 hci_handle_remote_features_received(conn); 2861 break; 2862 2863 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2864 handle = little_endian_read_16(packet, 3); 2865 conn = hci_connection_for_handle(handle); 2866 if (!conn) break; 2867 // status = ok, page = 1 2868 if (!packet[2]) { 2869 uint8_t page_number = packet[5]; 2870 uint8_t maximum_page_number = packet[6]; 2871 const uint8_t * features = &packet[7]; 2872 bool done = false; 2873 switch (page_number){ 2874 case 1: 2875 hci_handle_remote_features_page_1(conn, features); 2876 if (maximum_page_number >= 2){ 2877 // get Secure Connections (Controller) from Page 2 if available 2878 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2879 } else { 2880 // otherwise, assume SC (Controller) == SC (Host) 2881 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2882 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2883 } 2884 done = true; 2885 } 2886 break; 2887 case 2: 2888 hci_handle_remote_features_page_2(conn, features); 2889 done = true; 2890 break; 2891 default: 2892 break; 2893 } 2894 if (!done) break; 2895 } 2896 hci_handle_remote_features_received(conn); 2897 break; 2898 2899 case HCI_EVENT_LINK_KEY_REQUEST: 2900 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2901 hci_event_link_key_request_get_bd_addr(packet, addr); 2902 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2903 if (!conn) break; 2904 2905 // lookup link key in db if not cached 2906 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2907 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2908 } 2909 2910 // response sent by hci_run() 2911 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2912 #endif 2913 break; 2914 2915 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2916 hci_event_link_key_request_get_bd_addr(packet, addr); 2917 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2918 if (!conn) break; 2919 2920 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2921 2922 // CVE-2020-26555: ignore NULL link key 2923 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2924 if (btstack_is_null(&packet[8], 16)) break; 2925 2926 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2927 // Change Connection Encryption keeps link key type 2928 if (link_key_type != CHANGED_COMBINATION_KEY){ 2929 conn->link_key_type = link_key_type; 2930 } 2931 2932 // cache link key. link keys stored in little-endian format for legacy reasons 2933 memcpy(&conn->link_key, &packet[8], 16); 2934 2935 // only store link key: 2936 // - if bondable enabled 2937 if (hci_stack->bondable == false) break; 2938 // - if security level sufficient 2939 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2940 // - for SSP, also check if remote side requested bonding as well 2941 if (conn->link_key_type != COMBINATION_KEY){ 2942 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2943 if (!remote_bonding){ 2944 break; 2945 } 2946 } 2947 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2948 break; 2949 } 2950 2951 case HCI_EVENT_PIN_CODE_REQUEST: 2952 hci_event_pin_code_request_get_bd_addr(packet, addr); 2953 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2954 if (!conn) break; 2955 2956 hci_pairing_started(conn, false); 2957 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2958 if (!hci_stack->bondable ){ 2959 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2960 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2961 hci_run(); 2962 return; 2963 } 2964 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2965 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2966 log_info("Level 4 required, but SC not supported -> abort"); 2967 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2968 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2969 hci_run(); 2970 return; 2971 } 2972 break; 2973 2974 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2975 hci_event_io_capability_response_get_bd_addr(packet, addr); 2976 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2977 if (!conn) break; 2978 2979 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2980 hci_pairing_started(conn, true); 2981 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2982 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2983 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2984 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2985 #endif 2986 break; 2987 2988 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2989 hci_event_io_capability_response_get_bd_addr(packet, addr); 2990 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2991 if (!conn) break; 2992 2993 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2994 hci_connection_timestamp(conn); 2995 hci_pairing_started(conn, true); 2996 break; 2997 2998 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2999 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3000 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3001 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3002 if (!conn) break; 3003 3004 hci_connection_timestamp(conn); 3005 3006 hci_pairing_started(conn, true); 3007 3008 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3009 break; 3010 #endif 3011 3012 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3013 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3014 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3015 if (!conn) break; 3016 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3017 if (hci_stack->ssp_auto_accept){ 3018 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3019 }; 3020 } else { 3021 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3022 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3023 // don't forward event to app 3024 hci_run(); 3025 return; 3026 } 3027 break; 3028 3029 case HCI_EVENT_USER_PASSKEY_REQUEST: 3030 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3031 if (hci_stack->ssp_auto_accept){ 3032 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3033 }; 3034 break; 3035 3036 case HCI_EVENT_MODE_CHANGE: 3037 handle = hci_event_mode_change_get_handle(packet); 3038 conn = hci_connection_for_handle(handle); 3039 if (!conn) break; 3040 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3041 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3042 break; 3043 #endif 3044 3045 case HCI_EVENT_ENCRYPTION_CHANGE: 3046 handle = hci_event_encryption_change_get_connection_handle(packet); 3047 conn = hci_connection_for_handle(handle); 3048 if (!conn) break; 3049 if (hci_event_encryption_change_get_status(packet) == 0u) { 3050 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3051 if (encryption_enabled){ 3052 if (hci_is_le_connection(conn)){ 3053 // For LE, we accept connection as encrypted 3054 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3055 } 3056 #ifdef ENABLE_CLASSIC 3057 else { 3058 3059 // dedicated bonding: send result and disconnect 3060 if (conn->bonding_flags & BONDING_DEDICATED){ 3061 conn->bonding_flags &= ~BONDING_DEDICATED; 3062 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3063 conn->bonding_status = packet[2]; 3064 break; 3065 } 3066 3067 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3068 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3069 bool connected_uses_aes_ccm = encryption_enabled == 2; 3070 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3071 log_info("SC during pairing, but only E0 now -> abort"); 3072 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3073 break; 3074 } 3075 3076 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3077 if (connected_uses_aes_ccm){ 3078 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3079 } 3080 3081 #ifdef ENABLE_TESTING_SUPPORT 3082 // work around for issue with PTS dongle 3083 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3084 #endif 3085 3086 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3087 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3088 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3089 } else { 3090 // if not, pretend everything is perfect 3091 hci_handle_read_encryption_key_size_complete(conn, 16); 3092 } 3093 } 3094 #endif 3095 } else { 3096 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3097 } 3098 } 3099 3100 break; 3101 3102 #ifdef ENABLE_CLASSIC 3103 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3104 handle = hci_event_authentication_complete_get_connection_handle(packet); 3105 conn = hci_connection_for_handle(handle); 3106 if (!conn) break; 3107 3108 // clear authentication active flag 3109 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3110 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3111 3112 // authenticated only if auth status == 0 3113 if (hci_event_authentication_complete_get_status(packet) == 0){ 3114 // authenticated 3115 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3116 3117 // If not already encrypted, start encryption 3118 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3119 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3120 break; 3121 } 3122 } 3123 3124 // emit updated security level 3125 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3126 break; 3127 3128 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3129 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3130 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3131 if (!conn) break; 3132 3133 // treat successfully paired connection as authenticated 3134 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3135 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3136 } 3137 3138 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3139 break; 3140 #endif 3141 3142 // HCI_EVENT_DISCONNECTION_COMPLETE 3143 // has been split, to first notify stack before shutting connection down 3144 // see end of function, too. 3145 case HCI_EVENT_DISCONNECTION_COMPLETE: 3146 if (packet[2]) break; // status != 0 3147 handle = little_endian_read_16(packet, 3); 3148 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3149 if (hci_stack->acl_fragmentation_total_size > 0u) { 3150 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3151 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3152 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3153 hci_stack->acl_fragmentation_total_size = 0; 3154 hci_stack->acl_fragmentation_pos = 0; 3155 if (release_buffer){ 3156 hci_release_packet_buffer(); 3157 } 3158 } 3159 } 3160 3161 conn = hci_connection_for_handle(handle); 3162 if (!conn) break; 3163 #ifdef ENABLE_CLASSIC 3164 // pairing failed if it was ongoing 3165 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3166 #endif 3167 3168 // emit dedicatd bonding event 3169 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3170 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3171 } 3172 3173 // mark connection for shutdown, stop timers, reset state 3174 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3175 hci_connection_stop_timer(conn); 3176 hci_connection_init(conn); 3177 3178 #ifdef ENABLE_BLE 3179 #ifdef ENABLE_LE_PERIPHERAL 3180 // re-enable advertisements for le connections if active 3181 if (hci_is_le_connection(conn)){ 3182 hci_update_advertisements_enabled_for_current_roles(); 3183 } 3184 #endif 3185 #endif 3186 break; 3187 3188 case HCI_EVENT_HARDWARE_ERROR: 3189 log_error("Hardware Error: 0x%02x", packet[2]); 3190 if (hci_stack->hardware_error_callback){ 3191 (*hci_stack->hardware_error_callback)(packet[2]); 3192 } else { 3193 // if no special requests, just reboot stack 3194 hci_power_control_off(); 3195 hci_power_control_on(); 3196 } 3197 break; 3198 3199 #ifdef ENABLE_CLASSIC 3200 case HCI_EVENT_ROLE_CHANGE: 3201 if (packet[2]) break; // status != 0 3202 reverse_bd_addr(&packet[3], addr); 3203 addr_type = BD_ADDR_TYPE_ACL; 3204 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3205 if (!conn) break; 3206 conn->role = packet[9]; 3207 break; 3208 #endif 3209 3210 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3211 // release packet buffer only for asynchronous transport and if there are not further fragements 3212 if (hci_transport_synchronous()) { 3213 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3214 return; // instead of break: to avoid re-entering hci_run() 3215 } 3216 hci_stack->acl_fragmentation_tx_active = 0; 3217 if (hci_stack->acl_fragmentation_total_size) break; 3218 hci_release_packet_buffer(); 3219 3220 // L2CAP receives this event via the hci_emit_event below 3221 3222 #ifdef ENABLE_CLASSIC 3223 // For SCO, we do the can_send_now_check here 3224 hci_notify_if_sco_can_send_now(); 3225 #endif 3226 break; 3227 3228 #ifdef ENABLE_CLASSIC 3229 case HCI_EVENT_SCO_CAN_SEND_NOW: 3230 // For SCO, we do the can_send_now_check here 3231 hci_stack->sco_can_send_now = true; 3232 hci_notify_if_sco_can_send_now(); 3233 return; 3234 3235 // explode inquriy results for easier consumption 3236 case HCI_EVENT_INQUIRY_RESULT: 3237 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3238 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3239 gap_inquiry_explode(packet, size); 3240 break; 3241 #endif 3242 3243 #ifdef ENABLE_BLE 3244 case HCI_EVENT_LE_META: 3245 switch (packet[2]){ 3246 #ifdef ENABLE_LE_CENTRAL 3247 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3248 // log_info("advertising report received"); 3249 if (!hci_stack->le_scanning_enabled) break; 3250 le_handle_advertisement_report(packet, size); 3251 break; 3252 #endif 3253 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3254 event_handle_le_connection_complete(packet); 3255 break; 3256 3257 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3258 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3259 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3260 conn = hci_connection_for_handle(handle); 3261 if (!conn) break; 3262 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3263 break; 3264 3265 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3266 // connection 3267 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3268 conn = hci_connection_for_handle(handle); 3269 if (conn) { 3270 // read arguments 3271 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3272 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3273 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3274 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3275 3276 // validate against current connection parameter range 3277 le_connection_parameter_range_t existing_range; 3278 gap_get_connection_parameter_range(&existing_range); 3279 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3280 if (update_parameter){ 3281 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3282 conn->le_conn_interval_min = le_conn_interval_min; 3283 conn->le_conn_interval_max = le_conn_interval_max; 3284 conn->le_conn_latency = le_conn_latency; 3285 conn->le_supervision_timeout = le_supervision_timeout; 3286 } else { 3287 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3288 } 3289 } 3290 break; 3291 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3292 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3293 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3294 conn = hci_connection_for_handle(handle); 3295 if (conn) { 3296 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3297 } 3298 break; 3299 #endif 3300 default: 3301 break; 3302 } 3303 break; 3304 #endif 3305 case HCI_EVENT_VENDOR_SPECIFIC: 3306 // Vendor specific commands often create vendor specific event instead of num completed packets 3307 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3308 switch (hci_stack->manufacturer){ 3309 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3310 hci_stack->num_cmd_packets = 1; 3311 break; 3312 default: 3313 break; 3314 } 3315 break; 3316 default: 3317 break; 3318 } 3319 3320 handle_event_for_current_stack_state(packet, size); 3321 3322 // notify upper stack 3323 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3324 3325 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3326 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3327 handle = little_endian_read_16(packet, 3); 3328 hci_connection_t * aConn = hci_connection_for_handle(handle); 3329 // discard connection if app did not trigger a reconnect in the event handler 3330 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3331 hci_shutdown_connection(aConn); 3332 } 3333 } 3334 3335 // execute main loop 3336 hci_run(); 3337 } 3338 3339 #ifdef ENABLE_CLASSIC 3340 3341 #ifdef ENABLE_SCO_OVER_HCI 3342 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3343 static void sco_schedule_tx(hci_connection_t * conn); 3344 3345 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3346 log_debug("SCO TX Timeout"); 3347 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3348 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3349 if (!conn) return; 3350 3351 // trigger send 3352 conn->sco_tx_ready = 1; 3353 // extra packet if CVSD but SCO buffer is too short 3354 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3355 conn->sco_tx_ready++; 3356 } 3357 hci_notify_if_sco_can_send_now(); 3358 } 3359 3360 3361 #define SCO_TX_AFTER_RX_MS (6) 3362 3363 static void sco_schedule_tx(hci_connection_t * conn){ 3364 3365 uint32_t now = btstack_run_loop_get_time_ms(); 3366 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3367 int time_delta_ms = sco_tx_ms - now; 3368 3369 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3370 3371 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3372 btstack_run_loop_remove_timer(timer); 3373 btstack_run_loop_set_timer(timer, time_delta_ms); 3374 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3375 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3376 btstack_run_loop_add_timer(timer); 3377 } 3378 #endif 3379 3380 static void sco_handler(uint8_t * packet, uint16_t size){ 3381 // lookup connection struct 3382 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3383 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3384 if (!conn) return; 3385 3386 #ifdef ENABLE_SCO_OVER_HCI 3387 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3388 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3389 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3390 packet[2] = 0x3c; 3391 memmove(&packet[3], &packet[23], 63); 3392 size = 63; 3393 } 3394 } 3395 3396 if (hci_have_usb_transport()){ 3397 // Nothing to do 3398 } else { 3399 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 3400 if (hci_stack->synchronous_flow_control_enabled == 0){ 3401 uint32_t now = btstack_run_loop_get_time_ms(); 3402 3403 if (!conn->sco_rx_valid){ 3404 // ignore first 10 packets 3405 conn->sco_rx_count++; 3406 // log_debug("sco rx count %u", conn->sco_rx_count); 3407 if (conn->sco_rx_count == 10) { 3408 // use first timestamp as is and pretent it just started 3409 conn->sco_rx_ms = now; 3410 conn->sco_rx_valid = 1; 3411 conn->sco_rx_count = 0; 3412 sco_schedule_tx(conn); 3413 } 3414 } else { 3415 // track expected arrival timme 3416 conn->sco_rx_count++; 3417 conn->sco_rx_ms += 7; 3418 int delta = (int32_t) (now - conn->sco_rx_ms); 3419 if (delta > 0){ 3420 conn->sco_rx_ms++; 3421 } 3422 // log_debug("sco rx %u", conn->sco_rx_ms); 3423 sco_schedule_tx(conn); 3424 } 3425 } 3426 } 3427 #endif 3428 3429 // deliver to app 3430 if (hci_stack->sco_packet_handler) { 3431 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3432 } 3433 3434 #ifdef HAVE_SCO_TRANSPORT 3435 // We can send one packet for each received packet 3436 conn->sco_tx_ready++; 3437 hci_notify_if_sco_can_send_now(); 3438 #endif 3439 3440 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3441 conn->num_packets_completed++; 3442 hci_stack->host_completed_packets = 1; 3443 hci_run(); 3444 #endif 3445 } 3446 #endif 3447 3448 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3449 hci_dump_packet(packet_type, 1, packet, size); 3450 switch (packet_type) { 3451 case HCI_EVENT_PACKET: 3452 event_handler(packet, size); 3453 break; 3454 case HCI_ACL_DATA_PACKET: 3455 acl_handler(packet, size); 3456 break; 3457 #ifdef ENABLE_CLASSIC 3458 case HCI_SCO_DATA_PACKET: 3459 sco_handler(packet, size); 3460 break; 3461 #endif 3462 default: 3463 break; 3464 } 3465 } 3466 3467 /** 3468 * @brief Add event packet handler. 3469 */ 3470 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3471 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3472 } 3473 3474 3475 /** Register HCI packet handlers */ 3476 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3477 hci_stack->acl_packet_handler = handler; 3478 } 3479 3480 #ifdef ENABLE_CLASSIC 3481 /** 3482 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3483 */ 3484 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3485 hci_stack->sco_packet_handler = handler; 3486 } 3487 #endif 3488 3489 static void hci_state_reset(void){ 3490 // no connections yet 3491 hci_stack->connections = NULL; 3492 3493 // keep discoverable/connectable as this has been requested by the client(s) 3494 // hci_stack->discoverable = 0; 3495 // hci_stack->connectable = 0; 3496 // hci_stack->bondable = 1; 3497 // hci_stack->own_addr_type = 0; 3498 3499 // buffer is free 3500 hci_stack->hci_packet_buffer_reserved = false; 3501 3502 // no pending cmds 3503 hci_stack->decline_reason = 0; 3504 3505 hci_stack->secure_connections_active = false; 3506 3507 #ifdef ENABLE_CLASSIC 3508 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3509 hci_stack->gap_tasks = 3510 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3511 GAP_TASK_SET_CLASS_OF_DEVICE | 3512 GAP_TASK_SET_LOCAL_NAME | 3513 GAP_TASK_SET_EIR_DATA | 3514 GAP_TASK_WRITE_SCAN_ENABLE; 3515 #endif 3516 3517 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3518 hci_stack->classic_read_local_oob_data = true; 3519 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3520 #endif 3521 3522 // LE 3523 #ifdef ENABLE_BLE 3524 memset(hci_stack->le_random_address, 0, 6); 3525 hci_stack->le_random_address_set = 0; 3526 #endif 3527 #ifdef ENABLE_LE_CENTRAL 3528 hci_stack->le_scanning_active = false; 3529 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3530 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3531 hci_stack->le_whitelist_capacity = 0; 3532 #endif 3533 #ifdef ENABLE_LE_PERIPHERAL 3534 hci_stack->le_advertisements_active = false; 3535 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3536 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3537 } 3538 if (hci_stack->le_advertisements_data != NULL){ 3539 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3540 } 3541 #endif 3542 } 3543 3544 #ifdef ENABLE_CLASSIC 3545 /** 3546 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3547 */ 3548 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3549 // store and open remote device db 3550 hci_stack->link_key_db = link_key_db; 3551 if (hci_stack->link_key_db) { 3552 hci_stack->link_key_db->open(); 3553 } 3554 } 3555 #endif 3556 3557 void hci_init(const hci_transport_t *transport, const void *config){ 3558 3559 #ifdef HAVE_MALLOC 3560 if (!hci_stack) { 3561 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3562 } 3563 #else 3564 hci_stack = &hci_stack_static; 3565 #endif 3566 memset(hci_stack, 0, sizeof(hci_stack_t)); 3567 3568 // reference to use transport layer implementation 3569 hci_stack->hci_transport = transport; 3570 3571 // reference to used config 3572 hci_stack->config = config; 3573 3574 // setup pointer for outgoing packet buffer 3575 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3576 3577 // max acl payload size defined in config.h 3578 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3579 3580 // register packet handlers with transport 3581 transport->register_packet_handler(&packet_handler); 3582 3583 hci_stack->state = HCI_STATE_OFF; 3584 3585 // class of device 3586 hci_stack->class_of_device = 0x007a020c; // Smartphone 3587 3588 // bondable by default 3589 hci_stack->bondable = 1; 3590 3591 #ifdef ENABLE_CLASSIC 3592 // classic name 3593 hci_stack->local_name = default_classic_name; 3594 3595 // Master slave policy 3596 hci_stack->master_slave_policy = 1; 3597 3598 // Allow Role Switch 3599 hci_stack->allow_role_switch = 1; 3600 3601 // Default / minimum security level = 2 3602 hci_stack->gap_security_level = LEVEL_2; 3603 3604 // Default Security Mode 4 3605 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3606 3607 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3608 hci_stack->gap_required_encyrption_key_size = 7; 3609 3610 // Link Supervision Timeout 3611 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3612 3613 #endif 3614 3615 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3616 hci_stack->ssp_enable = 1; 3617 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3618 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3619 hci_stack->ssp_auto_accept = 1; 3620 3621 // Secure Connections: enable (requires support from Controller) 3622 hci_stack->secure_connections_enable = true; 3623 3624 // voice setting - signed 16 bit pcm data with CVSD over the air 3625 hci_stack->sco_voice_setting = 0x60; 3626 3627 #ifdef ENABLE_LE_CENTRAL 3628 // connection parameter to use for outgoing connections 3629 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3630 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3631 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3632 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3633 hci_stack->le_connection_latency = 4; // 4 3634 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3635 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3636 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3637 3638 // default LE Scanning 3639 hci_stack->le_scan_type = 0x1; // active 3640 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3641 hci_stack->le_scan_window = 0x30; // 30 ms 3642 #endif 3643 3644 #ifdef ENABLE_LE_PERIPHERAL 3645 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3646 #endif 3647 3648 // connection parameter range used to answer connection parameter update requests in l2cap 3649 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3650 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3651 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3652 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3653 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3654 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3655 3656 hci_state_reset(); 3657 } 3658 3659 void hci_deinit(void){ 3660 #ifdef HAVE_MALLOC 3661 if (hci_stack) { 3662 free(hci_stack); 3663 } 3664 #endif 3665 hci_stack = NULL; 3666 3667 #ifdef ENABLE_CLASSIC 3668 disable_l2cap_timeouts = 0; 3669 #endif 3670 } 3671 3672 /** 3673 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3674 */ 3675 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3676 hci_stack->chipset = chipset_driver; 3677 3678 // reset chipset driver - init is also called on power_up 3679 if (hci_stack->chipset && hci_stack->chipset->init){ 3680 hci_stack->chipset->init(hci_stack->config); 3681 } 3682 } 3683 3684 /** 3685 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3686 */ 3687 void hci_set_control(const btstack_control_t *hardware_control){ 3688 // references to used control implementation 3689 hci_stack->control = hardware_control; 3690 // init with transport config 3691 hardware_control->init(hci_stack->config); 3692 } 3693 3694 void hci_close(void){ 3695 3696 #ifdef ENABLE_CLASSIC 3697 // close remote device db 3698 if (hci_stack->link_key_db) { 3699 hci_stack->link_key_db->close(); 3700 } 3701 #endif 3702 3703 btstack_linked_list_iterator_t lit; 3704 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3705 while (btstack_linked_list_iterator_has_next(&lit)){ 3706 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3707 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3708 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3709 hci_shutdown_connection(connection); 3710 } 3711 3712 hci_power_control(HCI_POWER_OFF); 3713 3714 #ifdef HAVE_MALLOC 3715 free(hci_stack); 3716 #endif 3717 hci_stack = NULL; 3718 } 3719 3720 #ifdef HAVE_SCO_TRANSPORT 3721 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3722 hci_stack->sco_transport = sco_transport; 3723 sco_transport->register_packet_handler(&packet_handler); 3724 } 3725 #endif 3726 3727 #ifdef ENABLE_CLASSIC 3728 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3729 // validate ranage and set 3730 if (encryption_key_size < 7) return; 3731 if (encryption_key_size > 16) return; 3732 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3733 } 3734 3735 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3736 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3737 hci_stack->gap_security_mode = security_mode; 3738 return ERROR_CODE_SUCCESS; 3739 } else { 3740 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3741 } 3742 } 3743 3744 gap_security_mode_t gap_get_security_mode(void){ 3745 return hci_stack->gap_security_mode; 3746 } 3747 3748 void gap_set_security_level(gap_security_level_t security_level){ 3749 hci_stack->gap_security_level = security_level; 3750 } 3751 3752 gap_security_level_t gap_get_security_level(void){ 3753 if (hci_stack->gap_secure_connections_only_mode){ 3754 return LEVEL_4; 3755 } 3756 return hci_stack->gap_security_level; 3757 } 3758 3759 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3760 hci_stack->gap_minimal_service_security_level = security_level; 3761 } 3762 3763 void gap_set_secure_connections_only_mode(bool enable){ 3764 hci_stack->gap_secure_connections_only_mode = enable; 3765 } 3766 3767 bool gap_get_secure_connections_only_mode(void){ 3768 return hci_stack->gap_secure_connections_only_mode; 3769 } 3770 #endif 3771 3772 #ifdef ENABLE_CLASSIC 3773 void gap_set_class_of_device(uint32_t class_of_device){ 3774 hci_stack->class_of_device = class_of_device; 3775 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3776 hci_run(); 3777 } 3778 3779 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3780 hci_stack->default_link_policy_settings = default_link_policy_settings; 3781 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3782 hci_run(); 3783 } 3784 3785 void gap_set_allow_role_switch(bool allow_role_switch){ 3786 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3787 } 3788 3789 uint8_t hci_get_allow_role_switch(void){ 3790 return hci_stack->allow_role_switch; 3791 } 3792 3793 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3794 hci_stack->link_supervision_timeout = link_supervision_timeout; 3795 } 3796 3797 void hci_disable_l2cap_timeout_check(void){ 3798 disable_l2cap_timeouts = 1; 3799 } 3800 #endif 3801 3802 #ifndef HAVE_HOST_CONTROLLER_API 3803 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3804 void hci_set_bd_addr(bd_addr_t addr){ 3805 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3806 hci_stack->custom_bd_addr_set = 1; 3807 } 3808 #endif 3809 3810 // State-Module-Driver overview 3811 // state module low-level 3812 // HCI_STATE_OFF off close 3813 // HCI_STATE_INITIALIZING, on open 3814 // HCI_STATE_WORKING, on open 3815 // HCI_STATE_HALTING, on open 3816 // HCI_STATE_SLEEPING, off/sleep close 3817 // HCI_STATE_FALLING_ASLEEP on open 3818 3819 static int hci_power_control_on(void){ 3820 3821 // power on 3822 int err = 0; 3823 if (hci_stack->control && hci_stack->control->on){ 3824 err = (*hci_stack->control->on)(); 3825 } 3826 if (err){ 3827 log_error( "POWER_ON failed"); 3828 hci_emit_hci_open_failed(); 3829 return err; 3830 } 3831 3832 // int chipset driver 3833 if (hci_stack->chipset && hci_stack->chipset->init){ 3834 hci_stack->chipset->init(hci_stack->config); 3835 } 3836 3837 // init transport 3838 if (hci_stack->hci_transport->init){ 3839 hci_stack->hci_transport->init(hci_stack->config); 3840 } 3841 3842 // open transport 3843 err = hci_stack->hci_transport->open(); 3844 if (err){ 3845 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3846 if (hci_stack->control && hci_stack->control->off){ 3847 (*hci_stack->control->off)(); 3848 } 3849 hci_emit_hci_open_failed(); 3850 return err; 3851 } 3852 return 0; 3853 } 3854 3855 static void hci_power_control_off(void){ 3856 3857 log_info("hci_power_control_off"); 3858 3859 // close low-level device 3860 hci_stack->hci_transport->close(); 3861 3862 log_info("hci_power_control_off - hci_transport closed"); 3863 3864 // power off 3865 if (hci_stack->control && hci_stack->control->off){ 3866 (*hci_stack->control->off)(); 3867 } 3868 3869 log_info("hci_power_control_off - control closed"); 3870 3871 hci_stack->state = HCI_STATE_OFF; 3872 } 3873 3874 static void hci_power_control_sleep(void){ 3875 3876 log_info("hci_power_control_sleep"); 3877 3878 #if 0 3879 // don't close serial port during sleep 3880 3881 // close low-level device 3882 hci_stack->hci_transport->close(hci_stack->config); 3883 #endif 3884 3885 // sleep mode 3886 if (hci_stack->control && hci_stack->control->sleep){ 3887 (*hci_stack->control->sleep)(); 3888 } 3889 3890 hci_stack->state = HCI_STATE_SLEEPING; 3891 } 3892 3893 static int hci_power_control_wake(void){ 3894 3895 log_info("hci_power_control_wake"); 3896 3897 // wake on 3898 if (hci_stack->control && hci_stack->control->wake){ 3899 (*hci_stack->control->wake)(); 3900 } 3901 3902 #if 0 3903 // open low-level device 3904 int err = hci_stack->hci_transport->open(hci_stack->config); 3905 if (err){ 3906 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3907 if (hci_stack->control && hci_stack->control->off){ 3908 (*hci_stack->control->off)(); 3909 } 3910 hci_emit_hci_open_failed(); 3911 return err; 3912 } 3913 #endif 3914 3915 return 0; 3916 } 3917 3918 static void hci_power_transition_to_initializing(void){ 3919 // set up state machine 3920 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3921 hci_stack->hci_packet_buffer_reserved = false; 3922 hci_stack->state = HCI_STATE_INITIALIZING; 3923 hci_stack->substate = HCI_INIT_SEND_RESET; 3924 } 3925 3926 // returns error 3927 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3928 int err; 3929 switch (power_mode){ 3930 case HCI_POWER_ON: 3931 err = hci_power_control_on(); 3932 if (err != 0) { 3933 log_error("hci_power_control_on() error %d", err); 3934 return err; 3935 } 3936 hci_power_transition_to_initializing(); 3937 break; 3938 case HCI_POWER_OFF: 3939 // do nothing 3940 break; 3941 case HCI_POWER_SLEEP: 3942 // do nothing (with SLEEP == OFF) 3943 break; 3944 default: 3945 btstack_assert(false); 3946 break; 3947 } 3948 return ERROR_CODE_SUCCESS; 3949 } 3950 3951 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3952 switch (power_mode){ 3953 case HCI_POWER_ON: 3954 // do nothing 3955 break; 3956 case HCI_POWER_OFF: 3957 // no connections yet, just turn it off 3958 hci_power_control_off(); 3959 break; 3960 case HCI_POWER_SLEEP: 3961 // no connections yet, just turn it off 3962 hci_power_control_sleep(); 3963 break; 3964 default: 3965 btstack_assert(false); 3966 break; 3967 } 3968 return ERROR_CODE_SUCCESS; 3969 } 3970 3971 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3972 switch (power_mode){ 3973 case HCI_POWER_ON: 3974 // do nothing 3975 break; 3976 case HCI_POWER_OFF: 3977 // see hci_run 3978 hci_stack->state = HCI_STATE_HALTING; 3979 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3980 break; 3981 case HCI_POWER_SLEEP: 3982 // see hci_run 3983 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3984 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3985 break; 3986 default: 3987 btstack_assert(false); 3988 break; 3989 } 3990 return ERROR_CODE_SUCCESS; 3991 } 3992 3993 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3994 switch (power_mode){ 3995 case HCI_POWER_ON: 3996 hci_power_transition_to_initializing(); 3997 break; 3998 case HCI_POWER_OFF: 3999 // do nothing 4000 break; 4001 case HCI_POWER_SLEEP: 4002 // see hci_run 4003 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4004 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4005 break; 4006 default: 4007 btstack_assert(false); 4008 break; 4009 } 4010 return ERROR_CODE_SUCCESS; 4011 } 4012 4013 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4014 switch (power_mode){ 4015 case HCI_POWER_ON: 4016 hci_power_transition_to_initializing(); 4017 break; 4018 case HCI_POWER_OFF: 4019 // see hci_run 4020 hci_stack->state = HCI_STATE_HALTING; 4021 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4022 break; 4023 case HCI_POWER_SLEEP: 4024 // do nothing 4025 break; 4026 default: 4027 btstack_assert(false); 4028 break; 4029 } 4030 return ERROR_CODE_SUCCESS; 4031 } 4032 4033 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4034 int err; 4035 switch (power_mode){ 4036 case HCI_POWER_ON: 4037 err = hci_power_control_wake(); 4038 if (err) return err; 4039 hci_power_transition_to_initializing(); 4040 break; 4041 case HCI_POWER_OFF: 4042 hci_stack->state = HCI_STATE_HALTING; 4043 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4044 break; 4045 case HCI_POWER_SLEEP: 4046 // do nothing 4047 break; 4048 default: 4049 btstack_assert(false); 4050 break; 4051 } 4052 return ERROR_CODE_SUCCESS; 4053 } 4054 4055 int hci_power_control(HCI_POWER_MODE power_mode){ 4056 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4057 int err = 0; 4058 switch (hci_stack->state){ 4059 case HCI_STATE_OFF: 4060 err = hci_power_control_state_off(power_mode); 4061 break; 4062 case HCI_STATE_INITIALIZING: 4063 err = hci_power_control_state_initializing(power_mode); 4064 break; 4065 case HCI_STATE_WORKING: 4066 err = hci_power_control_state_working(power_mode); 4067 break; 4068 case HCI_STATE_HALTING: 4069 err = hci_power_control_state_halting(power_mode); 4070 break; 4071 case HCI_STATE_FALLING_ASLEEP: 4072 err = hci_power_control_state_falling_asleep(power_mode); 4073 break; 4074 case HCI_STATE_SLEEPING: 4075 err = hci_power_control_state_sleeping(power_mode); 4076 break; 4077 default: 4078 btstack_assert(false); 4079 break; 4080 } 4081 if (err != 0){ 4082 return err; 4083 } 4084 4085 // create internal event 4086 hci_emit_state(); 4087 4088 // trigger next/first action 4089 hci_run(); 4090 4091 return 0; 4092 } 4093 4094 4095 #ifdef ENABLE_CLASSIC 4096 4097 static void hci_update_scan_enable(void){ 4098 // 2 = page scan, 1 = inq scan 4099 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4100 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4101 hci_run(); 4102 } 4103 4104 void gap_discoverable_control(uint8_t enable){ 4105 if (enable) enable = 1; // normalize argument 4106 4107 if (hci_stack->discoverable == enable){ 4108 hci_emit_discoverable_enabled(hci_stack->discoverable); 4109 return; 4110 } 4111 4112 hci_stack->discoverable = enable; 4113 hci_update_scan_enable(); 4114 } 4115 4116 void gap_connectable_control(uint8_t enable){ 4117 if (enable) enable = 1; // normalize argument 4118 4119 // don't emit event 4120 if (hci_stack->connectable == enable) return; 4121 4122 hci_stack->connectable = enable; 4123 hci_update_scan_enable(); 4124 } 4125 #endif 4126 4127 void gap_local_bd_addr(bd_addr_t address_buffer){ 4128 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4129 } 4130 4131 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4132 static void hci_host_num_completed_packets(void){ 4133 4134 // create packet manually as arrays are not supported and num_commands should not get reduced 4135 hci_reserve_packet_buffer(); 4136 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4137 4138 uint16_t size = 0; 4139 uint16_t num_handles = 0; 4140 packet[size++] = 0x35; 4141 packet[size++] = 0x0c; 4142 size++; // skip param len 4143 size++; // skip num handles 4144 4145 // add { handle, packets } entries 4146 btstack_linked_item_t * it; 4147 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4148 hci_connection_t * connection = (hci_connection_t *) it; 4149 if (connection->num_packets_completed){ 4150 little_endian_store_16(packet, size, connection->con_handle); 4151 size += 2; 4152 little_endian_store_16(packet, size, connection->num_packets_completed); 4153 size += 2; 4154 // 4155 num_handles++; 4156 connection->num_packets_completed = 0; 4157 } 4158 } 4159 4160 packet[2] = size - 3; 4161 packet[3] = num_handles; 4162 4163 hci_stack->host_completed_packets = 0; 4164 4165 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4166 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4167 4168 // release packet buffer for synchronous transport implementations 4169 if (hci_transport_synchronous()){ 4170 hci_release_packet_buffer(); 4171 hci_emit_transport_packet_sent(); 4172 } 4173 } 4174 #endif 4175 4176 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4177 UNUSED(ds); 4178 hci_stack->substate = HCI_HALTING_CLOSE; 4179 // allow packet handlers to defer final shutdown 4180 hci_emit_state(); 4181 hci_run(); 4182 } 4183 4184 static bool hci_run_acl_fragments(void){ 4185 if (hci_stack->acl_fragmentation_total_size > 0u) { 4186 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4187 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4188 if (connection) { 4189 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4190 hci_send_acl_packet_fragments(connection); 4191 return true; 4192 } 4193 } else { 4194 // connection gone -> discard further fragments 4195 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4196 hci_stack->acl_fragmentation_total_size = 0; 4197 hci_stack->acl_fragmentation_pos = 0; 4198 } 4199 } 4200 return false; 4201 } 4202 4203 #ifdef ENABLE_CLASSIC 4204 static bool hci_run_general_gap_classic(void){ 4205 4206 // assert stack is working and classic is active 4207 if (hci_classic_supported() == false) return false; 4208 if (hci_stack->state != HCI_STATE_WORKING) return false; 4209 4210 // decline incoming connections 4211 if (hci_stack->decline_reason){ 4212 uint8_t reason = hci_stack->decline_reason; 4213 hci_stack->decline_reason = 0; 4214 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4215 return true; 4216 } 4217 4218 if (hci_stack->gap_tasks != 0){ 4219 hci_run_gap_tasks_classic(); 4220 return true; 4221 } 4222 4223 // start/stop inquiry 4224 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4225 uint8_t duration = hci_stack->inquiry_state; 4226 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4227 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4228 return true; 4229 } 4230 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4231 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4232 hci_send_cmd(&hci_inquiry_cancel); 4233 return true; 4234 } 4235 // remote name request 4236 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4237 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4238 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4239 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4240 return true; 4241 } 4242 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4243 // Local OOB data 4244 if (hci_stack->classic_read_local_oob_data){ 4245 hci_stack->classic_read_local_oob_data = false; 4246 if (hci_stack->local_supported_commands[1] & 0x10u){ 4247 hci_send_cmd(&hci_read_local_extended_oob_data); 4248 } else { 4249 hci_send_cmd(&hci_read_local_oob_data); 4250 } 4251 } 4252 #endif 4253 // pairing 4254 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4255 uint8_t state = hci_stack->gap_pairing_state; 4256 uint8_t pin_code[16]; 4257 switch (state){ 4258 case GAP_PAIRING_STATE_SEND_PIN: 4259 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4260 memset(pin_code, 0, 16); 4261 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4262 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4263 break; 4264 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4265 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4266 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4267 break; 4268 case GAP_PAIRING_STATE_SEND_PASSKEY: 4269 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4270 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4271 break; 4272 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4273 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4274 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4275 break; 4276 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4277 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4278 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4279 break; 4280 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4281 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4282 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4283 break; 4284 default: 4285 break; 4286 } 4287 return true; 4288 } 4289 return false; 4290 } 4291 #endif 4292 4293 #ifdef ENABLE_BLE 4294 static bool hci_run_general_gap_le(void){ 4295 4296 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4297 4298 if (hci_stack->state != HCI_STATE_WORKING) return false; 4299 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4300 4301 4302 // Phase 1: collect what to stop 4303 4304 bool scanning_stop = false; 4305 bool connecting_stop = false; 4306 bool advertising_stop = false; 4307 4308 #ifndef ENABLE_LE_CENTRAL 4309 UNUSED(scanning_stop); 4310 UNUSED(connecting_stop); 4311 #endif 4312 #ifndef ENABLE_LE_PERIPHERAL 4313 UNUSED(advertising_stop); 4314 #endif 4315 4316 // check if whitelist needs modification 4317 bool whitelist_modification_pending = false; 4318 btstack_linked_list_iterator_t lit; 4319 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4320 while (btstack_linked_list_iterator_has_next(&lit)){ 4321 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4322 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4323 whitelist_modification_pending = true; 4324 break; 4325 } 4326 } 4327 // check if resolving list needs modification 4328 bool resolving_list_modification_pending = false; 4329 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4330 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4331 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4332 resolving_list_modification_pending = true; 4333 } 4334 #endif 4335 4336 #ifdef ENABLE_LE_CENTRAL 4337 // scanning control 4338 if (hci_stack->le_scanning_active) { 4339 // stop if: 4340 // - parameter change required 4341 // - it's disabled 4342 // - whitelist change required but used for scanning 4343 // - resolving list modified 4344 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4345 if ((hci_stack->le_scanning_param_update) || 4346 !hci_stack->le_scanning_enabled || 4347 scanning_uses_whitelist || 4348 resolving_list_modification_pending){ 4349 4350 scanning_stop = true; 4351 } 4352 } 4353 #endif 4354 4355 #ifdef ENABLE_LE_CENTRAL 4356 // connecting control 4357 bool connecting_with_whitelist; 4358 switch (hci_stack->le_connecting_state){ 4359 case LE_CONNECTING_DIRECT: 4360 case LE_CONNECTING_WHITELIST: 4361 // stop connecting if: 4362 // - connecting uses white and whitelist modification pending 4363 // - if it got disabled 4364 // - resolving list modified 4365 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4366 if ((connecting_with_whitelist && whitelist_modification_pending) || 4367 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4368 resolving_list_modification_pending) { 4369 4370 connecting_stop = true; 4371 } 4372 break; 4373 default: 4374 break; 4375 } 4376 #endif 4377 4378 #ifdef ENABLE_LE_PERIPHERAL 4379 // le advertisement control 4380 if (hci_stack->le_advertisements_active){ 4381 // stop if: 4382 // - parameter change required 4383 // - it's disabled 4384 // - whitelist change required but used for advertisement filter policy 4385 // - resolving list modified 4386 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4387 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4388 if (advertising_change || 4389 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4390 (advertising_uses_whitelist & whitelist_modification_pending) || 4391 resolving_list_modification_pending) { 4392 4393 advertising_stop = true; 4394 } 4395 } 4396 #endif 4397 4398 4399 // Phase 2: stop everything that should be off during modifications 4400 4401 #ifdef ENABLE_LE_CENTRAL 4402 if (scanning_stop){ 4403 hci_stack->le_scanning_active = false; 4404 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4405 return true; 4406 } 4407 #endif 4408 4409 #ifdef ENABLE_LE_CENTRAL 4410 if (connecting_stop){ 4411 hci_send_cmd(&hci_le_create_connection_cancel); 4412 return true; 4413 } 4414 #endif 4415 4416 #ifdef ENABLE_LE_PERIPHERAL 4417 if (advertising_stop){ 4418 hci_stack->le_advertisements_active = false; 4419 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4420 return true; 4421 } 4422 #endif 4423 4424 // Phase 3: modify 4425 4426 #ifdef ENABLE_LE_CENTRAL 4427 if (hci_stack->le_scanning_param_update){ 4428 hci_stack->le_scanning_param_update = false; 4429 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4430 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4431 return true; 4432 } 4433 #endif 4434 4435 #ifdef ENABLE_LE_PERIPHERAL 4436 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4437 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4438 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4439 hci_send_cmd(&hci_le_set_advertising_parameters, 4440 hci_stack->le_advertisements_interval_min, 4441 hci_stack->le_advertisements_interval_max, 4442 hci_stack->le_advertisements_type, 4443 hci_stack->le_advertisements_own_addr_type, 4444 hci_stack->le_advertisements_direct_address_type, 4445 hci_stack->le_advertisements_direct_address, 4446 hci_stack->le_advertisements_channel_map, 4447 hci_stack->le_advertisements_filter_policy); 4448 return true; 4449 } 4450 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4451 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4452 uint8_t adv_data_clean[31]; 4453 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4454 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4455 hci_stack->le_advertisements_data_len); 4456 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4457 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4458 return true; 4459 } 4460 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4461 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4462 uint8_t scan_data_clean[31]; 4463 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4464 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4465 hci_stack->le_scan_response_data_len); 4466 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4467 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4468 return true; 4469 } 4470 #endif 4471 4472 4473 #ifdef ENABLE_LE_CENTRAL 4474 // if connect with whitelist was active and is not cancelled yet, wait until next time 4475 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4476 #endif 4477 4478 // LE Whitelist Management 4479 if (whitelist_modification_pending){ 4480 // add/remove entries 4481 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4482 while (btstack_linked_list_iterator_has_next(&lit)){ 4483 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4484 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4485 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4486 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4487 return true; 4488 } 4489 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4490 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4491 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4492 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4493 return true; 4494 } 4495 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4496 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4497 btstack_memory_whitelist_entry_free(entry); 4498 } 4499 } 4500 } 4501 4502 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4503 // LE Resolving List Management 4504 if (resolving_list_supported) { 4505 uint16_t i; 4506 switch (hci_stack->le_resolving_list_state) { 4507 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4508 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4509 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4510 return true; 4511 case LE_RESOLVING_LIST_READ_SIZE: 4512 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4513 hci_send_cmd(&hci_le_read_resolving_list_size); 4514 return true; 4515 case LE_RESOLVING_LIST_SEND_CLEAR: 4516 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4517 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4518 sizeof(hci_stack->le_resolving_list_add_entries)); 4519 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4520 sizeof(hci_stack->le_resolving_list_remove_entries)); 4521 hci_send_cmd(&hci_le_clear_resolving_list); 4522 return true; 4523 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4524 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4525 uint8_t offset = i >> 3; 4526 uint8_t mask = 1 << (i & 7); 4527 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4528 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4529 bd_addr_t peer_identity_addreses; 4530 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4531 sm_key_t peer_irk; 4532 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4533 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4534 4535 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4536 // trigger whitelist entry 'update' (work around for controller bug) 4537 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4538 while (btstack_linked_list_iterator_has_next(&lit)) { 4539 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4540 if (entry->address_type != peer_identity_addr_type) continue; 4541 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4542 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4543 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4544 } 4545 #endif 4546 4547 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4548 peer_identity_addreses); 4549 return true; 4550 } 4551 4552 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4553 4554 /* fall through */ 4555 4556 case LE_RESOLVING_LIST_ADD_ENTRIES: 4557 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4558 uint8_t offset = i >> 3; 4559 uint8_t mask = 1 << (i & 7); 4560 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4561 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4562 bd_addr_t peer_identity_addreses; 4563 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4564 sm_key_t peer_irk; 4565 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4566 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4567 const uint8_t *local_irk = gap_get_persistent_irk(); 4568 // command uses format specifier 'P' that stores 16-byte value without flip 4569 uint8_t local_irk_flipped[16]; 4570 uint8_t peer_irk_flipped[16]; 4571 reverse_128(local_irk, local_irk_flipped); 4572 reverse_128(peer_irk, peer_irk_flipped); 4573 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4574 peer_irk_flipped, local_irk_flipped); 4575 return true; 4576 } 4577 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4578 break; 4579 4580 default: 4581 break; 4582 } 4583 } 4584 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4585 #endif 4586 4587 // Phase 4: restore state 4588 4589 #ifdef ENABLE_LE_CENTRAL 4590 // re-start scanning 4591 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4592 hci_stack->le_scanning_active = true; 4593 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4594 return true; 4595 } 4596 #endif 4597 4598 #ifdef ENABLE_LE_CENTRAL 4599 // re-start connecting 4600 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4601 bd_addr_t null_addr; 4602 memset(null_addr, 0, 6); 4603 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4604 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4605 hci_send_cmd(&hci_le_create_connection, 4606 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4607 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4608 1, // use whitelist 4609 0, // peer address type 4610 null_addr, // peer bd addr 4611 hci_stack->le_connection_own_addr_type, // our addr type: 4612 hci_stack->le_connection_interval_min, // conn interval min 4613 hci_stack->le_connection_interval_max, // conn interval max 4614 hci_stack->le_connection_latency, // conn latency 4615 hci_stack->le_supervision_timeout, // conn latency 4616 hci_stack->le_minimum_ce_length, // min ce length 4617 hci_stack->le_maximum_ce_length // max ce length 4618 ); 4619 return true; 4620 } 4621 #endif 4622 4623 #ifdef ENABLE_LE_PERIPHERAL 4624 // re-start advertising 4625 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4626 // check if advertisements should be enabled given 4627 hci_stack->le_advertisements_active = true; 4628 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4629 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4630 return true; 4631 } 4632 #endif 4633 4634 return false; 4635 } 4636 #endif 4637 4638 static bool hci_run_general_pending_commands(void){ 4639 btstack_linked_item_t * it; 4640 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4641 hci_connection_t * connection = (hci_connection_t *) it; 4642 4643 switch(connection->state){ 4644 case SEND_CREATE_CONNECTION: 4645 switch(connection->address_type){ 4646 #ifdef ENABLE_CLASSIC 4647 case BD_ADDR_TYPE_ACL: 4648 log_info("sending hci_create_connection"); 4649 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4650 break; 4651 #endif 4652 default: 4653 #ifdef ENABLE_BLE 4654 #ifdef ENABLE_LE_CENTRAL 4655 log_info("sending hci_le_create_connection"); 4656 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4657 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4658 hci_send_cmd(&hci_le_create_connection, 4659 hci_stack->le_connection_scan_interval, // conn scan interval 4660 hci_stack->le_connection_scan_window, // conn scan windows 4661 0, // don't use whitelist 4662 connection->address_type, // peer address type 4663 connection->address, // peer bd addr 4664 hci_stack->le_connection_own_addr_type, // our addr type: 4665 hci_stack->le_connection_interval_min, // conn interval min 4666 hci_stack->le_connection_interval_max, // conn interval max 4667 hci_stack->le_connection_latency, // conn latency 4668 hci_stack->le_supervision_timeout, // conn latency 4669 hci_stack->le_minimum_ce_length, // min ce length 4670 hci_stack->le_maximum_ce_length // max ce length 4671 ); 4672 connection->state = SENT_CREATE_CONNECTION; 4673 #endif 4674 #endif 4675 break; 4676 } 4677 return true; 4678 4679 #ifdef ENABLE_CLASSIC 4680 case RECEIVED_CONNECTION_REQUEST: 4681 connection->role = HCI_ROLE_SLAVE; 4682 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4683 log_info("sending hci_accept_connection_request"); 4684 connection->state = ACCEPTED_CONNECTION_REQUEST; 4685 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4686 } 4687 return true; 4688 #endif 4689 4690 #ifdef ENABLE_BLE 4691 #ifdef ENABLE_LE_CENTRAL 4692 case SEND_CANCEL_CONNECTION: 4693 connection->state = SENT_CANCEL_CONNECTION; 4694 hci_send_cmd(&hci_le_create_connection_cancel); 4695 return true; 4696 #endif 4697 #endif 4698 case SEND_DISCONNECT: 4699 connection->state = SENT_DISCONNECT; 4700 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4701 return true; 4702 4703 default: 4704 break; 4705 } 4706 4707 // no further commands if connection is about to get shut down 4708 if (connection->state == SENT_DISCONNECT) continue; 4709 4710 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4711 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4712 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4713 return true; 4714 } 4715 4716 #ifdef ENABLE_CLASSIC 4717 4718 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4719 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4720 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4721 return true; 4722 } 4723 4724 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4725 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4726 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4727 return true; 4728 } 4729 4730 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4731 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4732 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4733 return true; 4734 } 4735 4736 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4737 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4738 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4739 return true; 4740 } 4741 4742 // Handling link key request requires remote supported features 4743 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4744 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4745 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4746 4747 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4748 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4749 if (have_link_key && security_level_sufficient){ 4750 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4751 } else { 4752 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4753 } 4754 return true; 4755 } 4756 4757 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4758 log_info("denying to pin request"); 4759 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4760 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4761 return true; 4762 } 4763 4764 // security assessment requires remote features 4765 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4766 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4767 hci_ssp_assess_security_on_io_cap_request(connection); 4768 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 4769 } 4770 4771 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4772 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4773 // set authentication requirements: 4774 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4775 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4776 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4777 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4778 authreq |= 1; 4779 } 4780 bool bonding = hci_stack->bondable; 4781 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4782 // if we have received IO Cap Response, we're in responder role 4783 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4784 if (bonding && !remote_bonding){ 4785 log_info("Remote not bonding, dropping local flag"); 4786 bonding = false; 4787 } 4788 } 4789 if (bonding){ 4790 if (connection->bonding_flags & BONDING_DEDICATED){ 4791 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4792 } else { 4793 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4794 } 4795 } 4796 uint8_t have_oob_data = 0; 4797 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4798 if (connection->classic_oob_c_192 != NULL){ 4799 have_oob_data |= 1; 4800 } 4801 if (connection->classic_oob_c_256 != NULL){ 4802 have_oob_data |= 2; 4803 } 4804 #endif 4805 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4806 return true; 4807 } 4808 4809 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4810 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4811 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4812 return true; 4813 } 4814 4815 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4816 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4817 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4818 const uint8_t zero[16] = { 0 }; 4819 const uint8_t * r_192 = zero; 4820 const uint8_t * c_192 = zero; 4821 const uint8_t * r_256 = zero; 4822 const uint8_t * c_256 = zero; 4823 // verify P-256 OOB 4824 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4825 c_256 = connection->classic_oob_c_256; 4826 if (connection->classic_oob_r_256 != NULL) { 4827 r_256 = connection->classic_oob_r_256; 4828 } 4829 } 4830 // verify P-192 OOB 4831 if ((connection->classic_oob_c_192 != NULL)) { 4832 c_192 = connection->classic_oob_c_192; 4833 if (connection->classic_oob_r_192 != NULL) { 4834 r_192 = connection->classic_oob_r_192; 4835 } 4836 } 4837 4838 // assess security 4839 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4840 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4841 if (need_level_4 && !can_reach_level_4){ 4842 log_info("Level 4 required, but not possible -> abort"); 4843 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4844 // send oob negative reply 4845 c_256 = NULL; 4846 c_192 = NULL; 4847 } 4848 4849 // Reply 4850 if (c_256 != zero) { 4851 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4852 } else if (c_192 != zero){ 4853 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4854 } else { 4855 hci_stack->classic_oob_con_handle = connection->con_handle; 4856 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4857 } 4858 return true; 4859 } 4860 #endif 4861 4862 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4863 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4864 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4865 return true; 4866 } 4867 4868 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4869 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4870 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4871 return true; 4872 } 4873 4874 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4875 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4876 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4877 return true; 4878 } 4879 4880 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4881 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4882 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4883 connection->state = SENT_DISCONNECT; 4884 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4885 return true; 4886 } 4887 4888 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4889 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4890 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4891 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4892 return true; 4893 } 4894 4895 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4896 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4897 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4898 return true; 4899 } 4900 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4901 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4902 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4903 return true; 4904 } 4905 #endif 4906 4907 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4908 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4909 #ifdef ENABLE_CLASSIC 4910 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4911 #endif 4912 if (connection->state != SENT_DISCONNECT){ 4913 connection->state = SENT_DISCONNECT; 4914 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4915 return true; 4916 } 4917 } 4918 4919 #ifdef ENABLE_CLASSIC 4920 uint16_t sniff_min_interval; 4921 switch (connection->sniff_min_interval){ 4922 case 0: 4923 break; 4924 case 0xffff: 4925 connection->sniff_min_interval = 0; 4926 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4927 return true; 4928 default: 4929 sniff_min_interval = connection->sniff_min_interval; 4930 connection->sniff_min_interval = 0; 4931 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4932 return true; 4933 } 4934 4935 if (connection->sniff_subrating_max_latency != 0xffff){ 4936 uint16_t max_latency = connection->sniff_subrating_max_latency; 4937 connection->sniff_subrating_max_latency = 0; 4938 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4939 return true; 4940 } 4941 4942 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4943 uint8_t service_type = (uint8_t) connection->qos_service_type; 4944 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4945 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 4946 return true; 4947 } 4948 4949 if (connection->request_role != HCI_ROLE_INVALID){ 4950 hci_role_t role = connection->request_role; 4951 connection->request_role = HCI_ROLE_INVALID; 4952 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4953 return true; 4954 } 4955 #endif 4956 4957 #ifdef ENABLE_BLE 4958 switch (connection->le_con_parameter_update_state){ 4959 // response to L2CAP CON PARAMETER UPDATE REQUEST 4960 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4961 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4962 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4963 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4964 0x0000, 0xffff); 4965 return true; 4966 case CON_PARAMETER_UPDATE_REPLY: 4967 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4968 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4969 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4970 0x0000, 0xffff); 4971 return true; 4972 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4973 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4974 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4975 return true; 4976 default: 4977 break; 4978 } 4979 if (connection->le_phy_update_all_phys != 0xffu){ 4980 uint8_t all_phys = connection->le_phy_update_all_phys; 4981 connection->le_phy_update_all_phys = 0xff; 4982 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 4983 return true; 4984 } 4985 #endif 4986 } 4987 return false; 4988 } 4989 4990 static void hci_run(void){ 4991 4992 bool done; 4993 4994 // send continuation fragments first, as they block the prepared packet buffer 4995 done = hci_run_acl_fragments(); 4996 if (done) return; 4997 4998 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4999 // send host num completed packets next as they don't require num_cmd_packets > 0 5000 if (!hci_can_send_comand_packet_transport()) return; 5001 if (hci_stack->host_completed_packets){ 5002 hci_host_num_completed_packets(); 5003 return; 5004 } 5005 #endif 5006 5007 if (!hci_can_send_command_packet_now()) return; 5008 5009 // global/non-connection oriented commands 5010 5011 5012 #ifdef ENABLE_CLASSIC 5013 // general gap classic 5014 done = hci_run_general_gap_classic(); 5015 if (done) return; 5016 #endif 5017 5018 #ifdef ENABLE_BLE 5019 // general gap le 5020 done = hci_run_general_gap_le(); 5021 if (done) return; 5022 #endif 5023 5024 // send pending HCI commands 5025 done = hci_run_general_pending_commands(); 5026 if (done) return; 5027 5028 // stack state sub statemachines 5029 hci_connection_t * connection; 5030 switch (hci_stack->state){ 5031 case HCI_STATE_INITIALIZING: 5032 hci_initializing_run(); 5033 break; 5034 5035 case HCI_STATE_HALTING: 5036 5037 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5038 switch (hci_stack->substate){ 5039 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5040 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5041 5042 #ifdef ENABLE_BLE 5043 #ifdef ENABLE_LE_CENTRAL 5044 // free whitelist entries 5045 { 5046 btstack_linked_list_iterator_t lit; 5047 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5048 while (btstack_linked_list_iterator_has_next(&lit)){ 5049 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5050 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5051 btstack_memory_whitelist_entry_free(entry); 5052 } 5053 } 5054 #endif 5055 #endif 5056 // close all open connections 5057 connection = (hci_connection_t *) hci_stack->connections; 5058 if (connection){ 5059 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5060 if (!hci_can_send_command_packet_now()) return; 5061 5062 // check state 5063 if (connection->state == SENT_DISCONNECT) return; 5064 connection->state = SENT_DISCONNECT; 5065 5066 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5067 5068 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5069 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5070 5071 // ... which would be ignored anyway as we shutdown (free) the connection now 5072 hci_shutdown_connection(connection); 5073 5074 // finally, send the disconnect command 5075 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5076 return; 5077 } 5078 5079 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5080 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5081 log_info("HCI_STATE_HALTING: wait 50 ms"); 5082 hci_stack->substate = HCI_HALTING_W4_TIMER; 5083 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5084 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5085 btstack_run_loop_add_timer(&hci_stack->timeout); 5086 break; 5087 } 5088 5089 /* fall through */ 5090 5091 case HCI_HALTING_CLOSE: 5092 log_info("HCI_STATE_HALTING, calling off"); 5093 5094 // switch mode 5095 hci_power_control_off(); 5096 5097 log_info("HCI_STATE_HALTING, emitting state"); 5098 hci_emit_state(); 5099 log_info("HCI_STATE_HALTING, done"); 5100 break; 5101 5102 case HCI_HALTING_W4_TIMER: 5103 // keep waiting 5104 5105 break; 5106 default: 5107 break; 5108 } 5109 5110 break; 5111 5112 case HCI_STATE_FALLING_ASLEEP: 5113 switch(hci_stack->substate) { 5114 case HCI_FALLING_ASLEEP_DISCONNECT: 5115 log_info("HCI_STATE_FALLING_ASLEEP"); 5116 // close all open connections 5117 connection = (hci_connection_t *) hci_stack->connections; 5118 if (connection){ 5119 5120 // send disconnect 5121 if (!hci_can_send_command_packet_now()) return; 5122 5123 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5124 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5125 5126 // send disconnected event right away - causes higher layer connections to get closed, too. 5127 hci_shutdown_connection(connection); 5128 return; 5129 } 5130 5131 if (hci_classic_supported()){ 5132 // disable page and inquiry scan 5133 if (!hci_can_send_command_packet_now()) return; 5134 5135 log_info("HCI_STATE_HALTING, disabling inq scans"); 5136 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5137 5138 // continue in next sub state 5139 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5140 break; 5141 } 5142 5143 /* fall through */ 5144 5145 case HCI_FALLING_ASLEEP_COMPLETE: 5146 log_info("HCI_STATE_HALTING, calling sleep"); 5147 // switch mode 5148 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5149 hci_emit_state(); 5150 break; 5151 5152 default: 5153 break; 5154 } 5155 break; 5156 5157 default: 5158 break; 5159 } 5160 } 5161 5162 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5163 // house-keeping 5164 5165 #ifdef ENABLE_CLASSIC 5166 bd_addr_t addr; 5167 hci_connection_t * conn; 5168 #endif 5169 #ifdef ENABLE_LE_CENTRAL 5170 uint8_t initiator_filter_policy; 5171 #endif 5172 5173 uint16_t opcode = little_endian_read_16(packet, 0); 5174 switch (opcode) { 5175 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5176 hci_stack->loopback_mode = packet[3]; 5177 break; 5178 5179 #ifdef ENABLE_CLASSIC 5180 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5181 reverse_bd_addr(&packet[3], addr); 5182 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5183 5184 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5185 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5186 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5187 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5188 } 5189 5190 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5191 if (!conn) { 5192 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5193 if (!conn) { 5194 // notify client that alloc failed 5195 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5196 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5197 } 5198 conn->state = SEND_CREATE_CONNECTION; 5199 conn->role = HCI_ROLE_MASTER; 5200 } 5201 5202 conn->con_handle = HCI_CON_HANDLE_INVALID; 5203 conn->role = HCI_ROLE_INVALID; 5204 5205 log_info("conn state %u", conn->state); 5206 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5207 switch (conn->state) { 5208 // if connection active exists 5209 case OPEN: 5210 // and OPEN, emit connection complete command 5211 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5212 // packet not sent to controller 5213 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5214 case RECEIVED_DISCONNECTION_COMPLETE: 5215 // create connection triggered in disconnect complete event, let's do it now 5216 break; 5217 case SEND_CREATE_CONNECTION: 5218 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5219 break; 5220 default: 5221 // otherwise, just ignore as it is already in the open process 5222 // packet not sent to controller 5223 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5224 } 5225 conn->state = SENT_CREATE_CONNECTION; 5226 5227 // track outgoing connection 5228 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5229 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5230 break; 5231 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5232 if (hci_stack->link_key_db) { 5233 reverse_bd_addr(&packet[3], addr); 5234 hci_stack->link_key_db->delete_link_key(addr); 5235 } 5236 break; 5237 5238 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5239 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5240 // setup_synchronous_connection? Voice setting at offset 22 5241 // TODO: compare to current setting if sco connection already active 5242 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5243 break; 5244 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5245 // accept_synchronus_connection? Voice setting at offset 18 5246 // TODO: compare to current setting if sco connection already active 5247 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5248 break; 5249 #endif 5250 #endif 5251 5252 #ifdef ENABLE_BLE 5253 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5254 hci_stack->le_random_address_set = 1; 5255 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5256 break; 5257 #ifdef ENABLE_LE_PERIPHERAL 5258 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5259 hci_stack->le_advertisements_active = packet[3] != 0; 5260 break; 5261 #endif 5262 #ifdef ENABLE_LE_CENTRAL 5263 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5264 // white list used? 5265 initiator_filter_policy = packet[7]; 5266 switch (initiator_filter_policy) { 5267 case 0: 5268 // whitelist not used 5269 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5270 break; 5271 case 1: 5272 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5273 break; 5274 default: 5275 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5276 break; 5277 } 5278 // track outgoing connection 5279 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5280 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5281 break; 5282 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5283 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5284 break; 5285 #endif 5286 #endif 5287 default: 5288 break; 5289 } 5290 5291 hci_stack->num_cmd_packets--; 5292 5293 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5294 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5295 if (err != 0){ 5296 return ERROR_CODE_HARDWARE_FAILURE; 5297 } 5298 return ERROR_CODE_SUCCESS; 5299 } 5300 5301 // disconnect because of security block 5302 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5303 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5304 if (!connection) return; 5305 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5306 } 5307 5308 5309 // Configure Secure Simple Pairing 5310 5311 #ifdef ENABLE_CLASSIC 5312 5313 // enable will enable SSP during init 5314 void gap_ssp_set_enable(int enable){ 5315 hci_stack->ssp_enable = enable; 5316 } 5317 5318 static int hci_local_ssp_activated(void){ 5319 return gap_ssp_supported() && hci_stack->ssp_enable; 5320 } 5321 5322 // if set, BTstack will respond to io capability request using authentication requirement 5323 void gap_ssp_set_io_capability(int io_capability){ 5324 hci_stack->ssp_io_capability = io_capability; 5325 } 5326 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5327 hci_stack->ssp_authentication_requirement = authentication_requirement; 5328 } 5329 5330 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5331 void gap_ssp_set_auto_accept(int auto_accept){ 5332 hci_stack->ssp_auto_accept = auto_accept; 5333 } 5334 5335 void gap_secure_connections_enable(bool enable){ 5336 hci_stack->secure_connections_enable = enable; 5337 } 5338 5339 #endif 5340 5341 // va_list part of hci_send_cmd 5342 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5343 if (!hci_can_send_command_packet_now()){ 5344 log_error("hci_send_cmd called but cannot send packet now"); 5345 return ERROR_CODE_COMMAND_DISALLOWED; 5346 } 5347 5348 // for HCI INITIALIZATION 5349 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5350 hci_stack->last_cmd_opcode = cmd->opcode; 5351 5352 hci_reserve_packet_buffer(); 5353 uint8_t * packet = hci_stack->hci_packet_buffer; 5354 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5355 uint8_t status = hci_send_cmd_packet(packet, size); 5356 5357 // release packet buffer on error or for synchronous transport implementations 5358 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5359 hci_release_packet_buffer(); 5360 hci_emit_transport_packet_sent(); 5361 } 5362 5363 return status; 5364 } 5365 5366 /** 5367 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5368 */ 5369 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5370 va_list argptr; 5371 va_start(argptr, cmd); 5372 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5373 va_end(argptr); 5374 return status; 5375 } 5376 5377 // Create various non-HCI events. 5378 // TODO: generalize, use table similar to hci_create_command 5379 5380 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5381 // dump packet 5382 if (dump) { 5383 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5384 } 5385 5386 // dispatch to all event handlers 5387 btstack_linked_list_iterator_t it; 5388 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5389 while (btstack_linked_list_iterator_has_next(&it)){ 5390 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5391 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5392 } 5393 } 5394 5395 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5396 if (!hci_stack->acl_packet_handler) return; 5397 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5398 } 5399 5400 #ifdef ENABLE_CLASSIC 5401 static void hci_notify_if_sco_can_send_now(void){ 5402 // notify SCO sender if waiting 5403 if (!hci_stack->sco_waiting_for_can_send_now) return; 5404 if (hci_can_send_sco_packet_now()){ 5405 hci_stack->sco_waiting_for_can_send_now = 0; 5406 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5407 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5408 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5409 } 5410 } 5411 5412 // parsing end emitting has been merged to reduce code size 5413 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5414 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5415 5416 uint8_t * eir_data; 5417 ad_context_t context; 5418 const uint8_t * name; 5419 uint8_t name_len; 5420 5421 if (size < 3) return; 5422 5423 int event_type = hci_event_packet_get_type(packet); 5424 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5425 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5426 5427 switch (event_type){ 5428 case HCI_EVENT_INQUIRY_RESULT: 5429 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5430 if (size != (3 + (num_responses * 14))) return; 5431 break; 5432 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5433 if (size != 257) return; 5434 if (num_responses != 1) return; 5435 break; 5436 default: 5437 return; 5438 } 5439 5440 // event[1] is set at the end 5441 int i; 5442 for (i=0; i<num_responses;i++){ 5443 memset(event, 0, sizeof(event)); 5444 event[0] = GAP_EVENT_INQUIRY_RESULT; 5445 uint8_t event_size = 27; // if name is not set by EIR 5446 5447 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5448 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5449 (void)memcpy(&event[9], 5450 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5451 3); // class of device 5452 (void)memcpy(&event[12], 5453 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5454 2); // clock offset 5455 5456 switch (event_type){ 5457 case HCI_EVENT_INQUIRY_RESULT: 5458 // 14,15,16,17 = 0, size 18 5459 break; 5460 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5461 event[14] = 1; 5462 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5463 // 16,17 = 0, size 18 5464 break; 5465 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5466 event[14] = 1; 5467 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5468 // EIR packets only contain a single inquiry response 5469 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5470 name = NULL; 5471 // Iterate over EIR data 5472 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5473 uint8_t data_type = ad_iterator_get_data_type(&context); 5474 uint8_t data_size = ad_iterator_get_data_len(&context); 5475 const uint8_t * data = ad_iterator_get_data(&context); 5476 // Prefer Complete Local Name over Shortened Local Name 5477 switch (data_type){ 5478 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5479 if (name) continue; 5480 /* fall through */ 5481 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5482 name = data; 5483 name_len = data_size; 5484 break; 5485 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5486 if (data_size != 8) break; 5487 event[16] = 1; 5488 memcpy(&event[17], data, 8); 5489 break; 5490 default: 5491 break; 5492 } 5493 } 5494 if (name){ 5495 event[25] = 1; 5496 // truncate name if needed 5497 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5498 event[26] = len; 5499 (void)memcpy(&event[27], name, len); 5500 event_size += len; 5501 } 5502 break; 5503 default: 5504 return; 5505 } 5506 event[1] = event_size - 2; 5507 hci_emit_event(event, event_size, 1); 5508 } 5509 } 5510 #endif 5511 5512 void hci_emit_state(void){ 5513 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5514 uint8_t event[3]; 5515 event[0] = BTSTACK_EVENT_STATE; 5516 event[1] = sizeof(event) - 2u; 5517 event[2] = hci_stack->state; 5518 hci_emit_event(event, sizeof(event), 1); 5519 } 5520 5521 #ifdef ENABLE_CLASSIC 5522 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5523 uint8_t event[13]; 5524 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5525 event[1] = sizeof(event) - 2; 5526 event[2] = status; 5527 little_endian_store_16(event, 3, con_handle); 5528 reverse_bd_addr(address, &event[5]); 5529 event[11] = 1; // ACL connection 5530 event[12] = 0; // encryption disabled 5531 hci_emit_event(event, sizeof(event), 1); 5532 } 5533 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5534 if (disable_l2cap_timeouts) return; 5535 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5536 uint8_t event[4]; 5537 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5538 event[1] = sizeof(event) - 2; 5539 little_endian_store_16(event, 2, conn->con_handle); 5540 hci_emit_event(event, sizeof(event), 1); 5541 } 5542 #endif 5543 5544 #ifdef ENABLE_BLE 5545 #ifdef ENABLE_LE_CENTRAL 5546 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5547 uint8_t event[21]; 5548 event[0] = HCI_EVENT_LE_META; 5549 event[1] = sizeof(event) - 2u; 5550 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5551 event[3] = status; 5552 little_endian_store_16(event, 4, con_handle); 5553 event[6] = 0; // TODO: role 5554 event[7] = address_type; 5555 reverse_bd_addr(address, &event[8]); 5556 little_endian_store_16(event, 14, 0); // interval 5557 little_endian_store_16(event, 16, 0); // latency 5558 little_endian_store_16(event, 18, 0); // supervision timeout 5559 event[20] = 0; // master clock accuracy 5560 hci_emit_event(event, sizeof(event), 1); 5561 } 5562 #endif 5563 #endif 5564 5565 static void hci_emit_transport_packet_sent(void){ 5566 // notify upper stack that it might be possible to send again 5567 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5568 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5569 } 5570 5571 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5572 uint8_t event[6]; 5573 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5574 event[1] = sizeof(event) - 2u; 5575 event[2] = 0; // status = OK 5576 little_endian_store_16(event, 3, con_handle); 5577 event[5] = reason; 5578 hci_emit_event(event, sizeof(event), 1); 5579 } 5580 5581 static void hci_emit_nr_connections_changed(void){ 5582 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5583 uint8_t event[3]; 5584 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5585 event[1] = sizeof(event) - 2u; 5586 event[2] = nr_hci_connections(); 5587 hci_emit_event(event, sizeof(event), 1); 5588 } 5589 5590 static void hci_emit_hci_open_failed(void){ 5591 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5592 uint8_t event[2]; 5593 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5594 event[1] = sizeof(event) - 2u; 5595 hci_emit_event(event, sizeof(event), 1); 5596 } 5597 5598 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5599 log_info("hci_emit_dedicated_bonding_result %u ", status); 5600 uint8_t event[9]; 5601 int pos = 0; 5602 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5603 event[pos++] = sizeof(event) - 2u; 5604 event[pos++] = status; 5605 reverse_bd_addr(address, &event[pos]); 5606 hci_emit_event(event, sizeof(event), 1); 5607 } 5608 5609 5610 #ifdef ENABLE_CLASSIC 5611 5612 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5613 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5614 uint8_t event[5]; 5615 int pos = 0; 5616 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5617 event[pos++] = sizeof(event) - 2; 5618 little_endian_store_16(event, 2, con_handle); 5619 pos += 2; 5620 event[pos++] = level; 5621 hci_emit_event(event, sizeof(event), 1); 5622 } 5623 5624 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5625 if (!connection) return LEVEL_0; 5626 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5627 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5628 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5629 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5630 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5631 // LEVEL 4 always requires 128 bit encrytion key size 5632 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5633 security_level = LEVEL_3; 5634 } 5635 return security_level; 5636 } 5637 5638 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5639 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5640 uint8_t event[3]; 5641 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5642 event[1] = sizeof(event) - 2; 5643 event[2] = enabled; 5644 hci_emit_event(event, sizeof(event), 1); 5645 } 5646 5647 // query if remote side supports eSCO 5648 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5649 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5650 if (!connection) return false; 5651 return (connection->remote_supported_features[0] & 1) != 0; 5652 } 5653 5654 static bool hci_ssp_supported(hci_connection_t * connection){ 5655 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5656 return (connection->bonding_flags & mask) == mask; 5657 } 5658 5659 // query if remote side supports SSP 5660 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5661 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5662 if (!connection) return false; 5663 return hci_ssp_supported(connection) ? 1 : 0; 5664 } 5665 5666 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5667 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5668 } 5669 5670 // GAP API 5671 /** 5672 * @bbrief enable/disable bonding. default is enabled 5673 * @praram enabled 5674 */ 5675 void gap_set_bondable_mode(int enable){ 5676 hci_stack->bondable = enable ? 1 : 0; 5677 } 5678 /** 5679 * @brief Get bondable mode. 5680 * @return 1 if bondable 5681 */ 5682 int gap_get_bondable_mode(void){ 5683 return hci_stack->bondable; 5684 } 5685 5686 /** 5687 * @brief map link keys to security levels 5688 */ 5689 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5690 switch (link_key_type){ 5691 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5692 return LEVEL_4; 5693 case COMBINATION_KEY: 5694 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5695 return LEVEL_3; 5696 default: 5697 return LEVEL_2; 5698 } 5699 } 5700 5701 /** 5702 * @brief map link keys to secure connection yes/no 5703 */ 5704 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5705 switch (link_key_type){ 5706 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5707 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5708 return 1; 5709 default: 5710 return 0; 5711 } 5712 } 5713 5714 /** 5715 * @brief map link keys to authenticated 5716 */ 5717 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5718 switch (link_key_type){ 5719 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5720 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5721 return 1; 5722 default: 5723 return 0; 5724 } 5725 } 5726 5727 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5728 log_info("gap_mitm_protection_required_for_security_level %u", level); 5729 return level > LEVEL_2; 5730 } 5731 5732 /** 5733 * @brief get current security level 5734 */ 5735 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5736 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5737 if (!connection) return LEVEL_0; 5738 return gap_security_level_for_connection(connection); 5739 } 5740 5741 /** 5742 * @brief request connection to device to 5743 * @result GAP_AUTHENTICATION_RESULT 5744 */ 5745 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5746 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5747 if (!connection){ 5748 hci_emit_security_level(con_handle, LEVEL_0); 5749 return; 5750 } 5751 5752 btstack_assert(hci_is_le_connection(connection) == false); 5753 5754 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 5755 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5756 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5757 requested_level = LEVEL_4; 5758 } 5759 5760 gap_security_level_t current_level = gap_security_level(con_handle); 5761 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5762 requested_level, connection->requested_security_level, current_level); 5763 5764 // authentication active if authentication request was sent or planned level > 0 5765 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5766 if (authentication_active){ 5767 // authentication already active 5768 if (connection->requested_security_level < requested_level){ 5769 // increase requested level as new level is higher 5770 // TODO: handle re-authentication when done 5771 connection->requested_security_level = requested_level; 5772 } 5773 } else { 5774 // no request active, notify if security sufficient 5775 if (requested_level <= current_level){ 5776 hci_emit_security_level(con_handle, current_level); 5777 return; 5778 } 5779 5780 // store request 5781 connection->requested_security_level = requested_level; 5782 5783 // start to authenticate connection 5784 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5785 hci_run(); 5786 } 5787 } 5788 5789 /** 5790 * @brief start dedicated bonding with device. disconnect after bonding 5791 * @param device 5792 * @param request MITM protection 5793 * @result GAP_DEDICATED_BONDING_COMPLETE 5794 */ 5795 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5796 5797 // create connection state machine 5798 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5799 5800 if (!connection){ 5801 return BTSTACK_MEMORY_ALLOC_FAILED; 5802 } 5803 5804 // delete linkn key 5805 gap_drop_link_key_for_bd_addr(device); 5806 5807 // configure LEVEL_2/3, dedicated bonding 5808 connection->state = SEND_CREATE_CONNECTION; 5809 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5810 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5811 connection->bonding_flags = BONDING_DEDICATED; 5812 5813 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5814 5815 // handle: connnection failure (connection complete != ok) 5816 // handle: authentication failure 5817 // handle: disconnect on done 5818 5819 hci_run(); 5820 5821 return 0; 5822 } 5823 5824 void gap_set_local_name(const char * local_name){ 5825 hci_stack->local_name = local_name; 5826 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5827 // also update EIR if not set by user 5828 if (hci_stack->eir_data == NULL){ 5829 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5830 } 5831 hci_run(); 5832 } 5833 #endif 5834 5835 5836 #ifdef ENABLE_BLE 5837 5838 #ifdef ENABLE_LE_CENTRAL 5839 void gap_start_scan(void){ 5840 hci_stack->le_scanning_enabled = true; 5841 hci_run(); 5842 } 5843 5844 void gap_stop_scan(void){ 5845 hci_stack->le_scanning_enabled = false; 5846 hci_run(); 5847 } 5848 5849 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5850 hci_stack->le_scan_type = scan_type; 5851 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5852 hci_stack->le_scan_interval = scan_interval; 5853 hci_stack->le_scan_window = scan_window; 5854 hci_stack->le_scanning_param_update = true; 5855 hci_run(); 5856 } 5857 5858 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5859 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5860 } 5861 5862 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5863 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5864 if (!conn){ 5865 // disallow if le connection is already outgoing 5866 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5867 log_error("le connection already active"); 5868 return ERROR_CODE_COMMAND_DISALLOWED; 5869 } 5870 5871 log_info("gap_connect: no connection exists yet, creating context"); 5872 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5873 if (!conn){ 5874 // notify client that alloc failed 5875 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5876 log_info("gap_connect: failed to alloc hci_connection_t"); 5877 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5878 } 5879 5880 // set le connecting state 5881 if (hci_is_le_connection_type(addr_type)){ 5882 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5883 } 5884 5885 conn->state = SEND_CREATE_CONNECTION; 5886 log_info("gap_connect: send create connection next"); 5887 hci_run(); 5888 return ERROR_CODE_SUCCESS; 5889 } 5890 5891 if (!hci_is_le_connection(conn) || 5892 (conn->state == SEND_CREATE_CONNECTION) || 5893 (conn->state == SENT_CREATE_CONNECTION)) { 5894 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5895 log_error("gap_connect: classic connection or connect is already being created"); 5896 return GATT_CLIENT_IN_WRONG_STATE; 5897 } 5898 5899 // check if connection was just disconnected 5900 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5901 log_info("gap_connect: send create connection (again)"); 5902 conn->state = SEND_CREATE_CONNECTION; 5903 hci_run(); 5904 return ERROR_CODE_SUCCESS; 5905 } 5906 5907 log_info("gap_connect: context exists with state %u", conn->state); 5908 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5909 hci_run(); 5910 return ERROR_CODE_SUCCESS; 5911 } 5912 5913 // @assumption: only a single outgoing LE Connection exists 5914 static hci_connection_t * gap_get_outgoing_connection(void){ 5915 btstack_linked_item_t *it; 5916 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5917 hci_connection_t * conn = (hci_connection_t *) it; 5918 if (!hci_is_le_connection(conn)) continue; 5919 switch (conn->state){ 5920 case SEND_CREATE_CONNECTION: 5921 case SENT_CREATE_CONNECTION: 5922 case SENT_CANCEL_CONNECTION: 5923 return conn; 5924 default: 5925 break; 5926 }; 5927 } 5928 return NULL; 5929 } 5930 5931 uint8_t gap_connect_cancel(void){ 5932 hci_connection_t * conn = gap_get_outgoing_connection(); 5933 if (!conn) return 0; 5934 switch (conn->state){ 5935 case SEND_CREATE_CONNECTION: 5936 // skip sending create connection and emit event instead 5937 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5938 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5939 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5940 btstack_memory_hci_connection_free( conn ); 5941 break; 5942 case SENT_CREATE_CONNECTION: 5943 // request to send cancel connection 5944 conn->state = SEND_CANCEL_CONNECTION; 5945 hci_run(); 5946 break; 5947 default: 5948 break; 5949 } 5950 return 0; 5951 } 5952 #endif 5953 5954 #ifdef ENABLE_LE_CENTRAL 5955 /** 5956 * @brief Set connection parameters for outgoing connections 5957 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5958 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5959 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5960 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5961 * @param conn_latency, default: 4 5962 * @param supervision_timeout (unit: 10ms), default: 720 ms 5963 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5964 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5965 */ 5966 5967 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5968 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5969 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5970 hci_stack->le_connection_scan_interval = conn_scan_interval; 5971 hci_stack->le_connection_scan_window = conn_scan_window; 5972 hci_stack->le_connection_interval_min = conn_interval_min; 5973 hci_stack->le_connection_interval_max = conn_interval_max; 5974 hci_stack->le_connection_latency = conn_latency; 5975 hci_stack->le_supervision_timeout = supervision_timeout; 5976 hci_stack->le_minimum_ce_length = min_ce_length; 5977 hci_stack->le_maximum_ce_length = max_ce_length; 5978 } 5979 #endif 5980 5981 /** 5982 * @brief Updates the connection parameters for a given LE connection 5983 * @param handle 5984 * @param conn_interval_min (unit: 1.25ms) 5985 * @param conn_interval_max (unit: 1.25ms) 5986 * @param conn_latency 5987 * @param supervision_timeout (unit: 10ms) 5988 * @returns 0 if ok 5989 */ 5990 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5991 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5992 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5993 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5994 connection->le_conn_interval_min = conn_interval_min; 5995 connection->le_conn_interval_max = conn_interval_max; 5996 connection->le_conn_latency = conn_latency; 5997 connection->le_supervision_timeout = supervision_timeout; 5998 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5999 hci_run(); 6000 return 0; 6001 } 6002 6003 /** 6004 * @brief Request an update of the connection parameter for a given LE connection 6005 * @param handle 6006 * @param conn_interval_min (unit: 1.25ms) 6007 * @param conn_interval_max (unit: 1.25ms) 6008 * @param conn_latency 6009 * @param supervision_timeout (unit: 10ms) 6010 * @returns 0 if ok 6011 */ 6012 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6013 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6014 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6015 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6016 connection->le_conn_interval_min = conn_interval_min; 6017 connection->le_conn_interval_max = conn_interval_max; 6018 connection->le_conn_latency = conn_latency; 6019 connection->le_supervision_timeout = supervision_timeout; 6020 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6021 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6022 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6023 return 0; 6024 } 6025 6026 #ifdef ENABLE_LE_PERIPHERAL 6027 6028 /** 6029 * @brief Set Advertisement Data 6030 * @param advertising_data_length 6031 * @param advertising_data (max 31 octets) 6032 * @note data is not copied, pointer has to stay valid 6033 */ 6034 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6035 hci_stack->le_advertisements_data_len = advertising_data_length; 6036 hci_stack->le_advertisements_data = advertising_data; 6037 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6038 hci_run(); 6039 } 6040 6041 /** 6042 * @brief Set Scan Response Data 6043 * @param advertising_data_length 6044 * @param advertising_data (max 31 octets) 6045 * @note data is not copied, pointer has to stay valid 6046 */ 6047 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6048 hci_stack->le_scan_response_data_len = scan_response_data_length; 6049 hci_stack->le_scan_response_data = scan_response_data; 6050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6051 hci_run(); 6052 } 6053 6054 /** 6055 * @brief Set Advertisement Parameters 6056 * @param adv_int_min 6057 * @param adv_int_max 6058 * @param adv_type 6059 * @param direct_address_type 6060 * @param direct_address 6061 * @param channel_map 6062 * @param filter_policy 6063 * 6064 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6065 */ 6066 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6067 uint8_t direct_address_typ, bd_addr_t direct_address, 6068 uint8_t channel_map, uint8_t filter_policy) { 6069 6070 hci_stack->le_advertisements_interval_min = adv_int_min; 6071 hci_stack->le_advertisements_interval_max = adv_int_max; 6072 hci_stack->le_advertisements_type = adv_type; 6073 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6074 hci_stack->le_advertisements_channel_map = channel_map; 6075 hci_stack->le_advertisements_filter_policy = filter_policy; 6076 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6077 6); 6078 6079 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6080 hci_run(); 6081 } 6082 6083 /** 6084 * @brief Enable/Disable Advertisements 6085 * @param enabled 6086 */ 6087 void gap_advertisements_enable(int enabled){ 6088 hci_stack->le_advertisements_enabled = enabled != 0; 6089 hci_update_advertisements_enabled_for_current_roles(); 6090 hci_run(); 6091 } 6092 6093 #endif 6094 6095 void hci_le_set_own_address_type(uint8_t own_address_type){ 6096 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6097 if (own_address_type == hci_stack->le_own_addr_type) return; 6098 hci_stack->le_own_addr_type = own_address_type; 6099 6100 #ifdef ENABLE_LE_PERIPHERAL 6101 // update advertisement parameters, too 6102 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6103 hci_run(); 6104 #endif 6105 #ifdef ENABLE_LE_CENTRAL 6106 // note: we don't update scan parameters or modify ongoing connection attempts 6107 #endif 6108 } 6109 6110 #endif 6111 6112 uint8_t gap_disconnect(hci_con_handle_t handle){ 6113 hci_connection_t * conn = hci_connection_for_handle(handle); 6114 if (!conn){ 6115 hci_emit_disconnection_complete(handle, 0); 6116 return 0; 6117 } 6118 // ignore if already disconnected 6119 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6120 return 0; 6121 } 6122 conn->state = SEND_DISCONNECT; 6123 hci_run(); 6124 return 0; 6125 } 6126 6127 int gap_read_rssi(hci_con_handle_t con_handle){ 6128 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6129 if (hci_connection == NULL) return 0; 6130 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6131 hci_run(); 6132 return 1; 6133 } 6134 6135 /** 6136 * @brief Get connection type 6137 * @param con_handle 6138 * @result connection_type 6139 */ 6140 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6141 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6142 if (!conn) return GAP_CONNECTION_INVALID; 6143 switch (conn->address_type){ 6144 case BD_ADDR_TYPE_LE_PUBLIC: 6145 case BD_ADDR_TYPE_LE_RANDOM: 6146 return GAP_CONNECTION_LE; 6147 case BD_ADDR_TYPE_SCO: 6148 return GAP_CONNECTION_SCO; 6149 case BD_ADDR_TYPE_ACL: 6150 return GAP_CONNECTION_ACL; 6151 default: 6152 return GAP_CONNECTION_INVALID; 6153 } 6154 } 6155 6156 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6157 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6158 if (!conn) return HCI_ROLE_INVALID; 6159 return (hci_role_t) conn->role; 6160 } 6161 6162 6163 #ifdef ENABLE_CLASSIC 6164 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6165 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6166 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6167 conn->request_role = role; 6168 hci_run(); 6169 return ERROR_CODE_SUCCESS; 6170 } 6171 #endif 6172 6173 #ifdef ENABLE_BLE 6174 6175 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 6176 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6177 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6178 6179 conn->le_phy_update_all_phys = all_phys; 6180 conn->le_phy_update_tx_phys = tx_phys; 6181 conn->le_phy_update_rx_phys = rx_phys; 6182 conn->le_phy_update_phy_options = phy_options; 6183 6184 hci_run(); 6185 6186 return 0; 6187 } 6188 6189 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6190 // check if already in list 6191 btstack_linked_list_iterator_t it; 6192 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6193 while (btstack_linked_list_iterator_has_next(&it)) { 6194 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6195 if (entry->address_type != address_type) { 6196 continue; 6197 } 6198 if (memcmp(entry->address, address, 6) != 0) { 6199 continue; 6200 } 6201 // disallow if already scheduled to add 6202 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6203 return ERROR_CODE_COMMAND_DISALLOWED; 6204 } 6205 // still on controller, but scheduled to remove -> re-add 6206 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 // alloc and add to list 6210 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6211 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6212 entry->address_type = address_type; 6213 (void)memcpy(entry->address, address, 6); 6214 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6215 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6216 return ERROR_CODE_SUCCESS; 6217 } 6218 6219 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6220 btstack_linked_list_iterator_t it; 6221 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6222 while (btstack_linked_list_iterator_has_next(&it)){ 6223 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6224 if (entry->address_type != address_type) { 6225 continue; 6226 } 6227 if (memcmp(entry->address, address, 6) != 0) { 6228 continue; 6229 } 6230 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6231 // remove from controller if already present 6232 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6233 } else { 6234 // directly remove entry from whitelist 6235 btstack_linked_list_iterator_remove(&it); 6236 btstack_memory_whitelist_entry_free(entry); 6237 } 6238 return ERROR_CODE_SUCCESS; 6239 } 6240 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6241 } 6242 6243 static void hci_whitelist_clear(void){ 6244 btstack_linked_list_iterator_t it; 6245 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6246 while (btstack_linked_list_iterator_has_next(&it)){ 6247 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6248 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6249 // remove from controller if already present 6250 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6251 continue; 6252 } 6253 // directly remove entry from whitelist 6254 btstack_linked_list_iterator_remove(&it); 6255 btstack_memory_whitelist_entry_free(entry); 6256 } 6257 } 6258 6259 /** 6260 * @brief Clear Whitelist 6261 * @returns 0 if ok 6262 */ 6263 uint8_t gap_whitelist_clear(void){ 6264 hci_whitelist_clear(); 6265 hci_run(); 6266 return ERROR_CODE_SUCCESS; 6267 } 6268 6269 /** 6270 * @brief Add Device to Whitelist 6271 * @param address_typ 6272 * @param address 6273 * @returns 0 if ok 6274 */ 6275 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6276 uint8_t status = hci_whitelist_add(address_type, address); 6277 if (status){ 6278 return status; 6279 } 6280 hci_run(); 6281 return ERROR_CODE_SUCCESS; 6282 } 6283 6284 /** 6285 * @brief Remove Device from Whitelist 6286 * @param address_typ 6287 * @param address 6288 * @returns 0 if ok 6289 */ 6290 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6291 uint8_t status = hci_whitelist_remove(address_type, address); 6292 if (status){ 6293 return status; 6294 } 6295 hci_run(); 6296 return ERROR_CODE_SUCCESS; 6297 } 6298 6299 #ifdef ENABLE_LE_CENTRAL 6300 /** 6301 * @brief Connect with Whitelist 6302 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6303 * @returns - if ok 6304 */ 6305 uint8_t gap_connect_with_whitelist(void){ 6306 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6307 return ERROR_CODE_COMMAND_DISALLOWED; 6308 } 6309 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6310 hci_run(); 6311 return ERROR_CODE_SUCCESS; 6312 } 6313 6314 /** 6315 * @brief Auto Connection Establishment - Start Connecting to device 6316 * @param address_typ 6317 * @param address 6318 * @returns 0 if ok 6319 */ 6320 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6321 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6322 return ERROR_CODE_COMMAND_DISALLOWED; 6323 } 6324 6325 uint8_t status = hci_whitelist_add(address_type, address); 6326 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6327 return status; 6328 } 6329 6330 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6331 6332 hci_run(); 6333 return ERROR_CODE_SUCCESS; 6334 } 6335 6336 /** 6337 * @brief Auto Connection Establishment - Stop Connecting to device 6338 * @param address_typ 6339 * @param address 6340 * @returns 0 if ok 6341 */ 6342 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6343 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6344 return ERROR_CODE_COMMAND_DISALLOWED; 6345 } 6346 6347 hci_whitelist_remove(address_type, address); 6348 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6349 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6350 } 6351 hci_run(); 6352 return 0; 6353 } 6354 6355 /** 6356 * @brief Auto Connection Establishment - Stop everything 6357 * @note Convenience function to stop all active auto connection attempts 6358 */ 6359 uint8_t gap_auto_connection_stop_all(void){ 6360 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6361 return ERROR_CODE_COMMAND_DISALLOWED; 6362 } 6363 hci_whitelist_clear(); 6364 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6365 hci_run(); 6366 return ERROR_CODE_SUCCESS; 6367 } 6368 6369 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6370 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6371 if (!conn) return 0; 6372 return conn->le_connection_interval; 6373 } 6374 #endif 6375 #endif 6376 6377 #ifdef ENABLE_CLASSIC 6378 /** 6379 * @brief Set Extended Inquiry Response data 6380 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6381 * @note has to be done before stack starts up 6382 */ 6383 void gap_set_extended_inquiry_response(const uint8_t * data){ 6384 hci_stack->eir_data = data; 6385 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6386 hci_run(); 6387 } 6388 6389 /** 6390 * @brief Start GAP Classic Inquiry 6391 * @param duration in 1.28s units 6392 * @return 0 if ok 6393 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6394 */ 6395 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6396 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6397 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6398 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6399 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6400 } 6401 hci_stack->inquiry_state = duration_in_1280ms_units; 6402 hci_run(); 6403 return 0; 6404 } 6405 6406 /** 6407 * @brief Stop GAP Classic Inquiry 6408 * @returns 0 if ok 6409 */ 6410 int gap_inquiry_stop(void){ 6411 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6412 // emit inquiry complete event, before it even started 6413 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6414 hci_emit_event(event, sizeof(event), 1); 6415 return 0; 6416 } 6417 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6418 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6419 hci_run(); 6420 return 0; 6421 } 6422 6423 void gap_inquiry_set_lap(uint32_t lap){ 6424 hci_stack->inquiry_lap = lap; 6425 } 6426 6427 6428 /** 6429 * @brief Remote Name Request 6430 * @param addr 6431 * @param page_scan_repetition_mode 6432 * @param clock_offset only used when bit 15 is set 6433 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6434 */ 6435 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6436 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6437 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6438 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6439 hci_stack->remote_name_clock_offset = clock_offset; 6440 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6441 hci_run(); 6442 return 0; 6443 } 6444 6445 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6446 hci_stack->gap_pairing_state = state; 6447 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6448 hci_run(); 6449 return 0; 6450 } 6451 6452 /** 6453 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6454 * @param addr 6455 * @param pin_data 6456 * @param pin_len 6457 * @return 0 if ok 6458 */ 6459 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6460 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6461 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6462 hci_stack->gap_pairing_pin_len = pin_len; 6463 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6464 } 6465 6466 /** 6467 * @brief Legacy Pairing Pin Code Response 6468 * @param addr 6469 * @param pin 6470 * @return 0 if ok 6471 */ 6472 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6473 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6474 } 6475 6476 /** 6477 * @brief Abort Legacy Pairing 6478 * @param addr 6479 * @param pin 6480 * @return 0 if ok 6481 */ 6482 int gap_pin_code_negative(bd_addr_t addr){ 6483 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6484 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6485 } 6486 6487 /** 6488 * @brief SSP Passkey Response 6489 * @param addr 6490 * @param passkey 6491 * @return 0 if ok 6492 */ 6493 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6494 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6495 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6496 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6497 } 6498 6499 /** 6500 * @brief Abort SSP Passkey Entry/Pairing 6501 * @param addr 6502 * @param pin 6503 * @return 0 if ok 6504 */ 6505 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6506 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6507 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6508 } 6509 6510 /** 6511 * @brief Accept SSP Numeric Comparison 6512 * @param addr 6513 * @param passkey 6514 * @return 0 if ok 6515 */ 6516 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6517 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6518 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6519 } 6520 6521 /** 6522 * @brief Abort SSP Numeric Comparison/Pairing 6523 * @param addr 6524 * @param pin 6525 * @return 0 if ok 6526 */ 6527 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6528 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6529 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6530 } 6531 6532 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6533 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6534 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6535 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6536 connectionSetAuthenticationFlags(conn, flag); 6537 hci_run(); 6538 return ERROR_CODE_SUCCESS; 6539 } 6540 #endif 6541 6542 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6543 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6544 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6545 } 6546 6547 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6548 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6549 } 6550 #endif 6551 6552 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6553 /** 6554 * @brief Report Remote OOB Data 6555 * @param bd_addr 6556 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6557 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6558 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6559 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6560 */ 6561 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 6562 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6563 if (connection == NULL) { 6564 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6565 } 6566 connection->classic_oob_c_192 = c_192; 6567 connection->classic_oob_r_192 = r_192; 6568 6569 // ignore P-256 if not supported by us 6570 if (hci_stack->secure_connections_active){ 6571 connection->classic_oob_c_256 = c_256; 6572 connection->classic_oob_r_256 = r_256; 6573 } 6574 6575 return ERROR_CODE_SUCCESS; 6576 } 6577 /** 6578 * @brief Generate new OOB data 6579 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6580 */ 6581 void gap_ssp_generate_oob_data(void){ 6582 hci_stack->classic_read_local_oob_data = true; 6583 hci_run(); 6584 } 6585 6586 #endif 6587 6588 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6589 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6590 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6591 if (connection == NULL) { 6592 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6593 } 6594 6595 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6596 connection->link_key_type = type; 6597 6598 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6599 } 6600 6601 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6602 /** 6603 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6604 * @param inquiry_mode see bluetooth_defines.h 6605 */ 6606 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6607 hci_stack->inquiry_mode = inquiry_mode; 6608 } 6609 6610 /** 6611 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6612 */ 6613 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6614 hci_stack->sco_voice_setting = voice_setting; 6615 } 6616 6617 /** 6618 * @brief Get SCO Voice Setting 6619 * @return current voice setting 6620 */ 6621 uint16_t hci_get_sco_voice_setting(void){ 6622 return hci_stack->sco_voice_setting; 6623 } 6624 6625 static int hci_have_usb_transport(void){ 6626 if (!hci_stack->hci_transport) return 0; 6627 const char * transport_name = hci_stack->hci_transport->name; 6628 if (!transport_name) return 0; 6629 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6630 } 6631 6632 /** @brief Get SCO packet length for current SCO Voice setting 6633 * @note Using SCO packets of the exact length is required for USB transfer 6634 * @return Length of SCO packets in bytes (not audio frames) 6635 */ 6636 uint16_t hci_get_sco_packet_length(void){ 6637 uint16_t sco_packet_length = 0; 6638 6639 #ifdef ENABLE_SCO_OVER_HCI 6640 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6641 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6642 6643 if (hci_have_usb_transport()){ 6644 // see Core Spec for H2 USB Transfer. 6645 // 3 byte SCO header + 24 bytes per connection 6646 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6647 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6648 } else { 6649 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6650 sco_packet_length = 3 + 60 * multiplier; 6651 // assert that it still fits inside an SCO buffer 6652 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6653 sco_packet_length = 3 + 60; 6654 } 6655 } 6656 #endif 6657 6658 #ifdef HAVE_SCO_TRANSPORT 6659 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6660 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6661 sco_packet_length = 3 + 60 * multiplier; 6662 #endif 6663 return sco_packet_length; 6664 } 6665 6666 /** 6667 * @brief Sets the master/slave policy 6668 * @param policy (0: attempt to become master, 1: let connecting device decide) 6669 */ 6670 void hci_set_master_slave_policy(uint8_t policy){ 6671 hci_stack->master_slave_policy = policy; 6672 } 6673 6674 #endif 6675 6676 HCI_STATE hci_get_state(void){ 6677 return hci_stack->state; 6678 } 6679 6680 #ifdef ENABLE_CLASSIC 6681 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6682 hci_stack->gap_classic_accept_callback = accept_callback; 6683 } 6684 #endif 6685 6686 /** 6687 * @brief Set callback for Bluetooth Hardware Error 6688 */ 6689 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6690 hci_stack->hardware_error_callback = fn; 6691 } 6692 6693 void hci_disconnect_all(void){ 6694 btstack_linked_list_iterator_t it; 6695 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6696 while (btstack_linked_list_iterator_has_next(&it)){ 6697 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6698 if (con->state == SENT_DISCONNECT) continue; 6699 con->state = SEND_DISCONNECT; 6700 } 6701 hci_run(); 6702 } 6703 6704 uint16_t hci_get_manufacturer(void){ 6705 return hci_stack->manufacturer; 6706 } 6707 6708 #ifdef ENABLE_BLE 6709 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6710 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6711 if (!hci_con) return NULL; 6712 return &hci_con->sm_connection; 6713 } 6714 6715 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6716 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6717 #endif 6718 6719 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6720 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6721 if (hci_connection == NULL) return 0; 6722 if (hci_is_le_connection(hci_connection)){ 6723 #ifdef ENABLE_BLE 6724 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6725 if (sm_conn->sm_connection_encrypted) { 6726 return sm_conn->sm_actual_encryption_key_size; 6727 } 6728 #endif 6729 } else { 6730 #ifdef ENABLE_CLASSIC 6731 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6732 return hci_connection->encryption_key_size; 6733 } 6734 #endif 6735 } 6736 return 0; 6737 } 6738 6739 int gap_authenticated(hci_con_handle_t con_handle){ 6740 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6741 if (hci_connection == NULL) return 0; 6742 6743 switch (hci_connection->address_type){ 6744 #ifdef ENABLE_BLE 6745 case BD_ADDR_TYPE_LE_PUBLIC: 6746 case BD_ADDR_TYPE_LE_RANDOM: 6747 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6748 return hci_connection->sm_connection.sm_connection_authenticated; 6749 #endif 6750 #ifdef ENABLE_CLASSIC 6751 case BD_ADDR_TYPE_SCO: 6752 case BD_ADDR_TYPE_ACL: 6753 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6754 #endif 6755 default: 6756 return 0; 6757 } 6758 } 6759 6760 int gap_secure_connection(hci_con_handle_t con_handle){ 6761 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6762 if (hci_connection == NULL) return 0; 6763 6764 switch (hci_connection->address_type){ 6765 #ifdef ENABLE_BLE 6766 case BD_ADDR_TYPE_LE_PUBLIC: 6767 case BD_ADDR_TYPE_LE_RANDOM: 6768 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6769 return hci_connection->sm_connection.sm_connection_sc; 6770 #endif 6771 #ifdef ENABLE_CLASSIC 6772 case BD_ADDR_TYPE_SCO: 6773 case BD_ADDR_TYPE_ACL: 6774 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6775 #endif 6776 default: 6777 return 0; 6778 } 6779 } 6780 6781 bool gap_bonded(hci_con_handle_t con_handle){ 6782 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6783 if (hci_connection == NULL) return 0; 6784 6785 #ifdef ENABLE_CLASSIC 6786 link_key_t link_key; 6787 link_key_type_t link_key_type; 6788 #endif 6789 switch (hci_connection->address_type){ 6790 #ifdef ENABLE_BLE 6791 case BD_ADDR_TYPE_LE_PUBLIC: 6792 case BD_ADDR_TYPE_LE_RANDOM: 6793 return hci_connection->sm_connection.sm_le_db_index >= 0; 6794 #endif 6795 #ifdef ENABLE_CLASSIC 6796 case BD_ADDR_TYPE_SCO: 6797 case BD_ADDR_TYPE_ACL: 6798 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6799 #endif 6800 default: 6801 return false; 6802 } 6803 } 6804 6805 #ifdef ENABLE_BLE 6806 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6807 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6808 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6809 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6810 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6811 return sm_conn->sm_connection_authorization_state; 6812 } 6813 #endif 6814 6815 #ifdef ENABLE_CLASSIC 6816 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 6817 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6818 if (!conn) return GAP_CONNECTION_INVALID; 6819 conn->sniff_min_interval = sniff_min_interval; 6820 conn->sniff_max_interval = sniff_max_interval; 6821 conn->sniff_attempt = sniff_attempt; 6822 conn->sniff_timeout = sniff_timeout; 6823 hci_run(); 6824 return 0; 6825 } 6826 6827 /** 6828 * @brief Exit Sniff mode 6829 * @param con_handle 6830 @ @return 0 if ok 6831 */ 6832 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6833 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6834 if (!conn) return GAP_CONNECTION_INVALID; 6835 conn->sniff_min_interval = 0xffff; 6836 hci_run(); 6837 return 0; 6838 } 6839 6840 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 6841 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6842 if (!conn) return GAP_CONNECTION_INVALID; 6843 conn->sniff_subrating_max_latency = max_latency; 6844 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6845 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6846 hci_run(); 6847 return ERROR_CODE_SUCCESS; 6848 } 6849 6850 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 6851 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6852 if (!conn) return GAP_CONNECTION_INVALID; 6853 conn->qos_service_type = service_type; 6854 conn->qos_token_rate = token_rate; 6855 conn->qos_peak_bandwidth = peak_bandwidth; 6856 conn->qos_latency = latency; 6857 conn->qos_delay_variation = delay_variation; 6858 hci_run(); 6859 return ERROR_CODE_SUCCESS; 6860 } 6861 6862 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6863 hci_stack->new_page_scan_interval = page_scan_interval; 6864 hci_stack->new_page_scan_window = page_scan_window; 6865 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6866 hci_run(); 6867 } 6868 6869 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6870 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6871 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6872 hci_run(); 6873 } 6874 6875 #endif 6876 6877 void hci_halting_defer(void){ 6878 if (hci_stack->state != HCI_STATE_HALTING) return; 6879 switch (hci_stack->substate){ 6880 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6881 case HCI_HALTING_CLOSE: 6882 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6883 break; 6884 default: 6885 break; 6886 } 6887 } 6888 6889 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6890 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6891 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6892 if (le_device_db_index >= le_device_db_max_count()) return; 6893 uint8_t offset = le_device_db_index >> 3; 6894 uint8_t mask = 1 << (le_device_db_index & 7); 6895 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6896 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6897 // note: go back to remove entries, otherwise, a remove + add will skip the add 6898 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6899 } 6900 } 6901 6902 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6903 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6904 if (le_device_db_index >= le_device_db_max_count()) return; 6905 uint8_t offset = le_device_db_index >> 3; 6906 uint8_t mask = 1 << (le_device_db_index & 7); 6907 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6908 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6909 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6910 } 6911 } 6912 6913 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6914 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6915 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6916 } 6917 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6918 // restart le resolving list update 6919 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6920 } 6921 return ERROR_CODE_SUCCESS; 6922 } 6923 #endif 6924 6925 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6926 void hci_setup_test_connections_fuzz(void){ 6927 hci_connection_t * conn; 6928 6929 // default address: 66:55:44:33:00:01 6930 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6931 6932 // setup Controller info 6933 hci_stack->num_cmd_packets = 255; 6934 hci_stack->acl_packets_total_num = 255; 6935 6936 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6937 addr[5] = 0x01; 6938 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6939 conn->con_handle = addr[5]; 6940 conn->role = HCI_ROLE_SLAVE; 6941 conn->state = RECEIVED_CONNECTION_REQUEST; 6942 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6943 6944 // setup incoming Classic SCO connection with con handle 0x0002 6945 addr[5] = 0x02; 6946 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6947 conn->con_handle = addr[5]; 6948 conn->role = HCI_ROLE_SLAVE; 6949 conn->state = RECEIVED_CONNECTION_REQUEST; 6950 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6951 6952 // setup ready Classic ACL connection with con handle 0x0003 6953 addr[5] = 0x03; 6954 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6955 conn->con_handle = addr[5]; 6956 conn->role = HCI_ROLE_SLAVE; 6957 conn->state = OPEN; 6958 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6959 6960 // setup ready Classic SCO connection with con handle 0x0004 6961 addr[5] = 0x04; 6962 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6963 conn->con_handle = addr[5]; 6964 conn->role = HCI_ROLE_SLAVE; 6965 conn->state = OPEN; 6966 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6967 6968 // setup ready LE ACL connection with con handle 0x005 and public address 6969 addr[5] = 0x05; 6970 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6971 conn->con_handle = addr[5]; 6972 conn->role = HCI_ROLE_SLAVE; 6973 conn->state = OPEN; 6974 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6975 conn->sm_connection.sm_connection_encrypted = 1; 6976 } 6977 6978 void hci_free_connections_fuzz(void){ 6979 btstack_linked_list_iterator_t it; 6980 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6981 while (btstack_linked_list_iterator_has_next(&it)){ 6982 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6983 btstack_linked_list_iterator_remove(&it); 6984 btstack_memory_hci_connection_free(con); 6985 } 6986 } 6987 void hci_simulate_working_fuzz(void){ 6988 hci_init_done(); 6989 hci_stack->num_cmd_packets = 255; 6990 } 6991 #endif 6992